One-trick tier list

Payoff = one-trick win rate minus casual win rate, in percentage points (pulled toward 0 when either side has few games). One-tricks out-win casual players on almost every champion (typically by 3.4 points), so tiers compare against that: S+ is 5+ points above the typical champion, D is 2.5+ below. One-tricks are often stronger players overall too, so read it as “how much mastery shows on this champion”. One-tricks' games with a premade duo partner (the same teammate in 3+ of their games, never on the enemy team) are left out, so a duo carrying a Yuumi doesn't count as mastery; the duo share is shown under each one-trick win rate. Mains = players with 20–50% of their games on it.