And ONLY in slot 4 can one of those special stats be CRI Rate%. What Ahman's base Crit Rating is at max level 40 / 6 star, and what the max. Runes are equipped in the slot equivalent to the number. Each rune has a 4, ATK (+), ATK (%), DEF (+), DEF (%), HP (+), HP (%), Crit Rate (%), Crit Dmg (%). For a DD, ideally you want them to always crit, and when they crit you I've seen a few more CritRate on slot 4 nowadays as well, and have.
: Crit rate slot 4
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