Reference

Equipment

Every piece of gear in the game, set by set. Pick a season, your class and a slot to find a piece. Open a card's Details for the extra stats it can roll and its gem sockets. The Assumptions panel says what the numbers assume.

How a piece is valued

A piece's main stat is its value at the piece's level, multiplied by the slot's enhancement and by a fixed quality factor. The enhancement is the +N: base enhancement up to the promotion's cap, then season enhancement above it. The game's tooltip reads "Gear Enhancement Level {0} + Season Level {1}". The secondary stat works the same way with its own values. Each additional stat is its own value times a random roll factor from the quality's range.

On top of all three sits the piece's Season Level ("Dropped Gear: Season Level {0}"). It is a multiplier that counts only while the piece's promotion is the server's current one ("Season Level expired due to mismatched season"). It is by far the largest number on a piece.

main = curve[level] x (1 + enhancement[+N]) x (1 + quality)   then   + main x seasonLevel[b]   (while the season matches)

Power is the game's item rating. Each flat stat counts its value times a score per point: 2.5 for ATK, DEF, Effect Hit and mastery, 0.5 for HP, 3.125 for SPD and 4.17 for the crit and block "value" stats. Each percent stat counts its value times its score times the rating of the base stat it scales. Power then adds the gems in the sockets and the piece's share of its set (the set's stat pair divided by the set's slot count).

The cards rate percent stats against the standard character the game uses when no player is involved, at the level you set. The game rates the non-season part of a piece at your base level. In game your own base stats take the standard character's place, so the percent part moves a little from player to player. A Season 2 Jade Sword checked against a real Champion II screen came out within 2%. Additional stats are counted at the roll you chose, averaged over the pool, until you pick a card's lines.

Picking a piece's lines. Open a card's Details and set each additional stat to what your piece rolled. A plain stat is pooled with the main and secondary stats and rated with them. Every other line is rated on its own. A two-stat line is rated on its tier's two stats. A special or proc line is rated on a fixed set of stats the game assigns it, times its tier and its own quality (Epic, Legendary or Mythic, ×1, ×1.25 or ×1.5). While the piece's season is the current one, its Season Level scales every non-plain line: ×1.5 from Season Level 1 and ×3 from 33 (31 on Expert pieces). Checked against a real Divine Ink Blade +150: ATK 124K, SPD 23.9K, Block Rate +12.4% and Block Efficiency +18.7%, Crit RES +15.3% and Block Rate +15.3%, and the special line's 22.5% all match the game's panel.

Caps by season

Gems

Every slot has four sockets, unlocked at enhancement +1, +130, +160 and +190. There are eight gem kinds with fifteen tiers each, and each kind fits a fixed set of slots. A gem's stat is a percent of your base stat.

Sets

Two pieces of a set give the stat pair, and four give the effect. Where a bonus fires a skill, the game does not list that skill's value with the set, so the line says so instead of guessing.