User blog comment:Emptylord/Custom Champion - Yaga the Stray Little Witch/@comment-5523473-20120919153153/@comment-3974211-20120920123949

I worked it out as a 190% MR scaling. She would have to deal 117 damage to deal 90 damage after MR (which is 60+30); so she needs 57 damage from her target's MR.

If they have 200 MR, rank-5 Clumsy Swipe is: 160 (+1.9 per target's magic resistance) = 540 damage. 540 damage * 200 MR = 180 damage, so 20 higher than her base damage even after damage mitigation.


 * chuckles to self when he remembers that he lowered the base damages with respect to level-1 MR*