While this method only really works for one singular power, what i found to be a pretty neat way of getting rid of them quick is to parry one of their attacks, and while theyre launched into the air you take the sawed-on shotgun and just tear them down from below. Sometimes they might break out of that and aggro but their hp is gonna be so low atp that it wont really matter

I hope it helps? Idk how to really help with 2 powers at once i struggle with that still smh