User blog comment:Aldari1994/Heidi, the Gun Witch/@comment-3148314-20150930001042/@comment-3148314-20151002004338

I'm one of those players who would try it nevertheless. :D

Active based on own MR: that way she might end like a bruiser if you go for tanky-MR items like SV.

Wit's End would synergise betzter with my second idea.

Active stealing enemies' MR. / "This feels like the weaker and less favourable option of the 2."

This would, however, be closer to the idea you had in mind.

"if you are focusing a target that you have already stolen MR from, the damage will be low and that feels weak"

True, this would be stronger in teamfights or perhaps in combination with Runaan's Hurricane. I thought that it might become too strong without limitation.

"All in all I really like the 1st idea and will go about changing that. Thank you."

I'm glad that I could help you. :) You're welcome.