Patches 16.19–16.20

Mains view. This shows what players who main Shaco (it’s their #1 mastery champion) pick in 644 of their games. The verdicts and numbers are still everyone’s. Mains get their own at 1,500 games. Everyone’s page

Keystone

Hail of Blades is the most picked. The others are compared with it. Pick one to see its page below.
KeystoneGamesPickedPickedHow often players take this option for this choice.MainsVerdictVerdictBetter or Worse means the whole margin sits on one side of zero. Even means the two are within a point. Win chance vs Hail of BladesWin chanceHow much more this option wins than the most picked one, in games alike in draft, patch and players. +1% is about one more win per 100 games. WhenWhen it pays offThe same difference split by game time. Lane is 0–14 min, mid is 14–25 and late is the rest. vs expectedvs expectedHow games with this option ended against their win chance when it was chosen. It’s a hint. The verdict reads the win chance number.
Hail of BladesShown below97352% of games · 52% of mains52%BaselineBaselineThe most picked option. The others are compared with it. Its own number compares it with the next most picked.−1.1% ±2.3vs Arcane CometLane +0.3%Mid −1.1%Late −0.3%vs expected −1.8%±3.1Arcane Comet56830% of games · 34% of mains34%Unclear+1.1% ±2.3Lane −0.3%Mid +1.1%Late +0.3%vs expected +3.9%±4.1
Dark Harvest27415% of games · 11% of mains11%Unclear+0.1% ±2.4Lane −0.5%Mid +0.3%Late +0.3%vs expected Not enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.
Deathfire Touch422% of games · 0% of mains0%Not enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.vs expected Not enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.
How to read the numbers
Better +2.0%

The main number is how much more an option wins than the most picked one in similar games. Those are games with the same draft odds, played on the same patch by players with as much experience. A +2.0% means about two more wins per 100 games. Numbers from few games are pulled toward what the option does on other champions.

±1.2

± is the marginMargin (±)The real number is very likely inside this range. More games make it narrower.. The real difference is very likely inside it. On the bar, the dot is the number and the band is the margin. The black line means no difference.

BetterWorseEvenUnclear

Better or Worse means the whole margin is on one side of zero and the difference is at least half a point. Even means we know the two are within a point of each other. Unclear means it could go either way. With Not enough games, there are too few games to say anything yet.

vs expected +1.7%

vs expected (WPA) asks whether games with the option ended better than their win chance when it was chosen. It doesn’t compare options with each other. Next to it is the win chance it’s usually taken at.

Lane 0–14 min · Mid 14–25 · Late 25 to the end.The full guide

Full pages with Hail of Blades

Each Hail of Blades page compared with the most played one
PageGamesPickedPickedHow often players take this, out of the games with this keystone.VerdictVerdictBetter or Worse means the whole margin sits on one side of zero. Even means the two are within a point. Win chance vs the most played pageWin chanceHow much more this option wins than the most picked one, in games alike in draft, patch and players. +1% is about one more win per 100 games. WhenWhen it pays offThe same difference split by game time. Lane is 0–14 min, mid is 14–25 and late is the rest. vs expectedvs expectedHow games with this option ended against their win chance when it was chosen. It’s a hint. The verdict reads the win chance number.
Coup de Grace, Legend: Alacrity41643% of gamesBaselineBaselineThe most picked option. The others are compared with it. Its own number compares it with the next most picked.The others are compared with itvs expected −1.5%±4.8
Coup de Grace, Legend: Alacrity839% of gamesNot enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.vs expected Not enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.
Cut Down, Legend: Alacrity667% of gamesNot enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.vs expected Not enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.
Cash Back, Approach Velocity445% of gamesNot enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.vs expected Not enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.
Cut Down, Legend: Alacrity404% of gamesNot enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.vs expected Not enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.
Magical Footwear, Approach Velocity253% of gamesNot enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.vs expected Not enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.

Where each rune leads

What each keystone’s games buy as their first two legendary items. These are plain counts from 1,887 games.
Hail of Blades973 games
Arcane Comet568 games
  • lethality like Umbral Glaive into Voltaic Cyclosword
  • damage like Voltaic Cyclosword into The Collector
  • mixed like Blackfire Torch into Liandry's Torment
  • other builds or under two items
Every build and its games
KeystoneBuildShareGames
Hail of Bladeslethality Umbral Glaive into Voltaic Cyclosword (173 with this exact pair)44%431
damage Voltaic Cyclosword into The Collector (169 with this exact pair)42%410
Other builds 77 · Under two items 5514%132
Arcane Cometmixed Blackfire Torch into Liandry's Torment (322 with this exact pair)59%333
Other builds 196 · Under two items 3941%235

Hail of Blades page

These numbers come from 973 Hail of Blades games. The ringed rune is the most picked in its row, and the others are compared with it.

Domination

Primary
ElectrocuteUnder 1%0% of mains
Dark Harvest15% of gamesPickedHow often this rune is taken in its row. A page has two secondary runes. Their rows add up to 200%.11% of mains
Hail of Blades52% of gamesPickedHow often this rune is taken in its row. A page has two secondary runes. Their rows add up to 200%.52% of mains
Cheap ShotUnder 1%
Taste of BloodUnder 1%
Sudden Impact99% of gamesPickedHow often this rune is taken in its row. A page has two secondary runes. Their rows add up to 200%.vs expectedvs expectedHow games with this option ended against their win chance when it was chosen. It’s a hint. The verdict reads the win chance number.−1.6%±3.2Too close to callToo close to callPlenty of games, but too few players tried both, or the gap with the most picked option is too small to call. It could go either way.
Sixth Sense49% of gamesPickedHow often this rune is taken in its row. A page has two secondary runes. Their rows add up to 200%.vs expectedvs expectedHow games with this option ended against their win chance when it was chosen. It’s a hint. The verdict reads the win chance number.−3.6%±4.5Too close to callToo close to callPlenty of games, but too few players tried both, or the gap with the most picked option is too small to call. It could go either way.
Grisly Mementos50% of gamesPickedHow often this rune is taken in its row. A page has two secondary runes. Their rows add up to 200%.vs expectedvs expectedHow games with this option ended against their win chance when it was chosen. It’s a hint. The verdict reads the win chance number.−0.4%±4.4BaselineBaselineThe most picked option. The others are compared with it. Its own number compares it with the next most picked.
Deep Ward1% of gamesPickedHow often this rune is taken in its row. A page has two secondary runes. Their rows add up to 200%.vs expectedvs expectedHow games with this option ended against their win chance when it was chosen. It’s a hint. The verdict reads the win chance number.Not enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.Not enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.
Treasure Hunter23% of gamesPickedHow often this rune is taken in its row. A page has two secondary runes. Their rows add up to 200%.vs expectedvs expectedHow games with this option ended against their win chance when it was chosen. It’s a hint. The verdict reads the win chance number.Not enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.Unclear+0.2% ±2.4LaneWhen it pays offThe same difference split by game time. Lane is 0–14 min, mid is 14–25 and late is the rest. +0.2%MidWhen it pays offThe same difference split by game time. Lane is 0–14 min, mid is 14–25 and late is the rest. −0.2%LateWhen it pays offThe same difference split by game time. Lane is 0–14 min, mid is 14–25 and late is the rest. +0.2%
Relentless Hunter74% of gamesPickedHow often this rune is taken in its row. A page has two secondary runes. Their rows add up to 200%.vs expectedvs expectedHow games with this option ended against their win chance when it was chosen. It’s a hint. The verdict reads the win chance number.−2.4%±3.6BaselineBaselineThe most picked option. The others are compared with it. Its own number compares it with the next most picked.−0.2% ±2.4LaneWhen it pays offThe same difference split by game time. Lane is 0–14 min, mid is 14–25 and late is the rest. −0.2%MidWhen it pays offThe same difference split by game time. Lane is 0–14 min, mid is 14–25 and late is the rest. +0.2%LateWhen it pays offThe same difference split by game time. Lane is 0–14 min, mid is 14–25 and late is the rest. −0.2%vs Treasure Hunter
Ultimate Hunter2% of gamesPickedHow often this rune is taken in its row. A page has two secondary runes. Their rows add up to 200%.vs expectedvs expectedHow games with this option ended against their win chance when it was chosen. It’s a hint. The verdict reads the win chance number.Not enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.Not enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.

Precision as secondary: 73% of Hail of Blades gamesPickedHow often players take this, out of the games with this keystone. · vs expectedvs expectedHow games with this option ended against their win chance when it was chosen. It’s a hint. The verdict reads the win chance number.−2.1%±3.7. A page takes two of these runes. Each is compared with the most picked rune in its row.

Absorb LifeUnder 1%
Triumph7% of gamesPickedHow often this rune is taken in its row. A page has two secondary runes. Their rows add up to 200%.vs expectedvs expectedHow games with this option ended against their win chance when it was chosen. It’s a hint. The verdict reads the win chance number.Not enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.Not enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.
Presence of MindUnder 1%
Legend: Alacrity95% of gamesPickedHow often this rune is taken in its row. A page has two secondary runes. Their rows add up to 200%.vs expectedvs expectedHow games with this option ended against their win chance when it was chosen. It’s a hint. The verdict reads the win chance number.−1.4%±3.8Too close to callToo close to callPlenty of games, but too few players tried both, or the gap with the most picked option is too small to call. It could go either way.
Legend: Haste1% of gamesPickedHow often this rune is taken in its row. A page has two secondary runes. Their rows add up to 200%.vs expectedvs expectedHow games with this option ended against their win chance when it was chosen. It’s a hint. The verdict reads the win chance number.Not enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.Not enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.
Legend: BloodlineUnder 1%
Coup de Grace78% of gamesPickedHow often this rune is taken in its row. A page has two secondary runes. Their rows add up to 200%.vs expectedvs expectedHow games with this option ended against their win chance when it was chosen. It’s a hint. The verdict reads the win chance number.−3.3%±4.1BaselineBaselineThe most picked option. The others are compared with it. Its own number compares it with the next most picked.
Cut Down18% of gamesPickedHow often this rune is taken in its row. A page has two secondary runes. Their rows add up to 200%.vs expectedvs expectedHow games with this option ended against their win chance when it was chosen. It’s a hint. The verdict reads the win chance number.Not enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.Too close to callToo close to callPlenty of games, but too few players tried both, or the gap with the most picked option is too small to call. It could go either way.
Last StandUnder 1%

Inspiration as secondary: 21% of Hail of Blades gamesPickedHow often players take this, out of the games with this keystone. · vs expectedvs expectedHow games with this option ended against their win chance when it was chosen. It’s a hint. The verdict reads the win chance number.Not enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in. · vs the most picked treeWin chanceHow much more this option wins than the most picked one, in games alike in draft, patch and players. +1% is about one more win per 100 games. −0.2% ±2.4. A page takes two of these runes. Each is compared with the most picked rune in its row.

Hextech FlashtraptionUnder 1%
Magical Footwear47% of gamesPickedHow often this rune is taken in its row. A page has two secondary runes. Their rows add up to 200%.vs expectedvs expectedHow games with this option ended against their win chance when it was chosen. It’s a hint. The verdict reads the win chance number.Not enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.Not enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.
Cash Back52% of gamesPickedHow often this rune is taken in its row. A page has two secondary runes. Their rows add up to 200%.vs expectedvs expectedHow games with this option ended against their win chance when it was chosen. It’s a hint. The verdict reads the win chance number.Not enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.BaselineBaselineThe most picked option. The others are compared with it. Its own number compares it with the next most picked.
Triple Tonic15% of gamesPickedHow often this rune is taken in its row. A page has two secondary runes. Their rows add up to 200%.vs expectedvs expectedHow games with this option ended against their win chance when it was chosen. It’s a hint. The verdict reads the win chance number.Not enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.Not enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.
Time Warp TonicUnder 1%
Biscuit DeliveryUnder 1%
Cosmic Insight17% of gamesPickedHow often this rune is taken in its row. A page has two secondary runes. Their rows add up to 200%.vs expectedvs expectedHow games with this option ended against their win chance when it was chosen. It’s a hint. The verdict reads the win chance number.Not enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.Not enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.
Approach Velocity67% of gamesPickedHow often this rune is taken in its row. A page has two secondary runes. Their rows add up to 200%.vs expectedvs expectedHow games with this option ended against their win chance when it was chosen. It’s a hint. The verdict reads the win chance number.Not enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.BaselineBaselineThe most picked option. The others are compared with it. Its own number compares it with the next most picked.
Jack of All Trades1% of gamesPickedHow often this rune is taken in its row. A page has two secondary runes. Their rows add up to 200%.vs expectedvs expectedHow games with this option ended against their win chance when it was chosen. It’s a hint. The verdict reads the win chance number.Not enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.Not enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.

Sorcery as secondary: 6% of Hail of Blades gamesPickedHow often players take this, out of the games with this keystone. · vs expectedvs expectedHow games with this option ended against their win chance when it was chosen. It’s a hint. The verdict reads the win chance number.Not enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.

Axiom Arcanist2% of gamesPickedHow often this rune is taken in its row. A page has two secondary runes. Their rows add up to 200%.vs expectedvs expectedHow games with this option ended against their win chance when it was chosen. It’s a hint. The verdict reads the win chance number.Not enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.Not enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.
Manaflow BandUnder 1%
Nimbus Cloak7% of gamesPickedHow often this rune is taken in its row. A page has two secondary runes. Their rows add up to 200%.vs expectedvs expectedHow games with this option ended against their win chance when it was chosen. It’s a hint. The verdict reads the win chance number.Not enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.Not enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.
Transcendence10% of gamesPickedHow often this rune is taken in its row. A page has two secondary runes. Their rows add up to 200%.vs expectedvs expectedHow games with this option ended against their win chance when it was chosen. It’s a hint. The verdict reads the win chance number.Not enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.Not enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.
Celerity10% of gamesPickedHow often this rune is taken in its row. A page has two secondary runes. Their rows add up to 200%.vs expectedvs expectedHow games with this option ended against their win chance when it was chosen. It’s a hint. The verdict reads the win chance number.Not enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.Not enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.
Absolute Focus79% of gamesPickedHow often this rune is taken in its row. A page has two secondary runes. Their rows add up to 200%.vs expectedvs expectedHow games with this option ended against their win chance when it was chosen. It’s a hint. The verdict reads the win chance number.Not enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.Not enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.
Scorch2% of gamesPickedHow often this rune is taken in its row. A page has two secondary runes. Their rows add up to 200%.vs expectedvs expectedHow games with this option ended against their win chance when it was chosen. It’s a hint. The verdict reads the win chance number.Not enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.Not enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.
Waterwalking9% of gamesPickedHow often this rune is taken in its row. A page has two secondary runes. Their rows add up to 200%.vs expectedvs expectedHow games with this option ended against their win chance when it was chosen. It’s a hint. The verdict reads the win chance number.Not enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.Not enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.
Gathering Storm81% of gamesPickedHow often this rune is taken in its row. A page has two secondary runes. Their rows add up to 200%.vs expectedvs expectedHow games with this option ended against their win chance when it was chosen. It’s a hint. The verdict reads the win chance number.Not enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.Not enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.

Resolve as secondary: under 1% of Hail of Blades gamesPickedHow often players take this, out of the games with this keystone. · vs expectedvs expectedHow games with this option ended against their win chance when it was chosen. It’s a hint. The verdict reads the win chance number.Not enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.

DemolishUnder 1%
Font of LifeUnder 1%
Shield BashUnder 1%
ConditioningUnder 1%
Second WindUnder 1%
Bone Plating100% of gamesPickedHow often this rune is taken in its row. A page has two secondary runes. Their rows add up to 200%.vs expectedvs expectedHow games with this option ended against their win chance when it was chosen. It’s a hint. The verdict reads the win chance number.Not enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.Not enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.
OvergrowthUnder 1%
RevitalizeUnder 1%
Unflinching100% of gamesPickedHow often this rune is taken in its row. A page has two secondary runes. Their rows add up to 200%.vs expectedvs expectedHow games with this option ended against their win chance when it was chosen. It’s a hint. The verdict reads the win chance number.Not enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.Not enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.

Shards

Offense
Adaptive Force5% of gamesPickedHow often this rune is taken in its row. A page has two secondary runes. Their rows add up to 200%.vs expectedvs expectedHow games with this option ended against their win chance when it was chosen. It’s a hint. The verdict reads the win chance number.Not enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.Not enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.
Attack Speed95% of gamesPickedHow often this rune is taken in its row. A page has two secondary runes. Their rows add up to 200%.vs expectedvs expectedHow games with this option ended against their win chance when it was chosen. It’s a hint. The verdict reads the win chance number.−1.4%±3.2BaselineBaselineThe most picked option. The others are compared with it. Its own number compares it with the next most picked.
Ability HasteUnder 1%
Flex
Adaptive Force98% of gamesPickedHow often this rune is taken in its row. A page has two secondary runes. Their rows add up to 200%.vs expectedvs expectedHow games with this option ended against their win chance when it was chosen. It’s a hint. The verdict reads the win chance number.−1.7%±3.2BaselineBaselineThe most picked option. The others are compared with it. Its own number compares it with the next most picked.
Move Speed2% of gamesPickedHow often this rune is taken in its row. A page has two secondary runes. Their rows add up to 200%.vs expectedvs expectedHow games with this option ended against their win chance when it was chosen. It’s a hint. The verdict reads the win chance number.Not enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.Not enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.
Health ScalingUnder 1%
Defense
Health22% of gamesPickedHow often this rune is taken in its row. A page has two secondary runes. Their rows add up to 200%.vs expectedvs expectedHow games with this option ended against their win chance when it was chosen. It’s a hint. The verdict reads the win chance number.Not enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.Unclear−0.1% ±2.3
Tenacity and Slow Resist3% of gamesPickedHow often this rune is taken in its row. A page has two secondary runes. Their rows add up to 200%.vs expectedvs expectedHow games with this option ended against their win chance when it was chosen. It’s a hint. The verdict reads the win chance number.Not enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.Not enough gamesNot enough gamesToo few games to say anything yet. The number shows once more games come in.
Health Scaling75% of gamesPickedHow often this rune is taken in its row. A page has two secondary runes. Their rows add up to 200%.vs expectedvs expectedHow games with this option ended against their win chance when it was chosen. It’s a hint. The verdict reads the win chance number.−1.6%±3.6BaselineBaselineThe most picked option. The others are compared with it. Its own number compares it with the next most picked.+0.1% ±2.3vs Health

Under each rune you’ll see how often it’s taken, its verdict and its difference from the ringed rune (the most picked in its row). The ringed rune is compared with the next most picked. Gray runes are in under 1% of games. The small print shows what the rune did per minute over all 1,887 games. Too few mains took Hail of Blades to show their share of each rune.

Everyone or mains

Mains are players whose #1 mastery champion is this one. We know the mastery of 717,000 ranked players from Platinum to Challenger. That covers about half the players in our games. Below 1,500 games by mains, the mains view shows what they pick next to everyone’s verdicts. From 1,500 games on, every number is the mains’ own.

More in the guide

WPA (win probability added)

On the pages it’s labelled “vs expected”. It compares how games with the option ended with the win chance they had when it was chosen (the draft for runes and spells, the minute of purchase for items). +1.0% is about one more win per 100 games than expected. The comparison is with what players usually do from there. It can’t compare two options with each other. Because popular options make up most of what “usual” is, it understates them. Options that strong players favor also look better here than they are. Use it as a hint and let the main number decide the verdict.

More in the guide

Win chance against the most picked

This is how much more each option wins than the most picked one, in points of win chance. The games compared have the same draft odds or game state, the same patch and the same player experience. Numbers from few games are then pulled toward what the same option does on other champions. A number from 300 games keeps little of its size. With thousands of games, most of it stays.

More in the guide

Better, worse, even, unclear

The verdict reads the number after the pull and its 95% margin (±). Better or Worse needs the whole margin on one side of zero and a difference of at least half a point. Even means we know the two are within a point of each other. When it could go either way, the verdict is Unclear. Not enough games means too few players tried both, or the number is mostly the pull.

More in the guide

Lane, mid and late game

The difference is split by when the win chance moved: lane (0–14 min), mid game (14–25) and late game (25 to the end). The three add up to the whole game. They show when an option pays off or costs you.

More in the guide

Not enough games

There are too few games to say anything yet. The margin would be wider than ±5%, or the number would be too noisy to say anything. The number appears once more games narrow the margin.

More in the guide

Where each rune leads

A build here is the kind of pair your first two legendary items make, read from the items’ stats. Bruiser means both give health, armor or magic resist and at least one gives damage. Burst means both give ability power and nothing that keeps you alive. Mixed is one of each. Tank, crit, lethality, damage and support pairs follow the same rule. Each build is named by its most common pair. The shares are plain counts of games. Items are bought after the rune is chosen. Two keystones compared inside one build describe those games. They don’t prove the rune caused the result.

More in the guide