That multiplicative skill damage effect is nice. Maybe better than crit actually because it's not affected (yet) by a more and more common debuff. The tower introduced it and last ExAqua Shadows use it too (if I'm not wrong). I'm pretty sure we will see this somewhere else in the future.
Judjing by the recent hardest level, I think Insane raw damages (like Convoluvus) and Debuff may become the new meta. There is too much girls with ATK debuff and too much bosses with very high ATK stat. It's almost the same for DEF debuff.
edit: I finally got Vervain with pity. Same as Tampala. I really hates that new R-medals shop without 2020 girls. It keeps away too many good girls.
I got Stock on the 8th roll. I hope she will be reworked soon. She really need it.