User blog comment:Kushieda minori/Archwitch skills/@comment-26452375-20150928220327/@comment-25435121-20150928235648

yeah, that Wave proc rate is a bit odd. I'm not sure how Nubee is using it. Sometimes I do feel like it's 95% in the advanced hall.

The Damage would be based off the ATK of the attacking witch, so for the Elemental Wave, it would be the primary Archwitch, usually the one in the middle.