Anyone pick up Shadow of Mordor?

[Tonto1911]

Quick question, anyone figure out the chance of an Uruk Captain coming back scarred/burnt/whatever? I've beaten the game and I'm trying to figure out the different things they can say/look like after encounters with Talion. I've burnt them, shot them in the face, basically everything I can without removing their head to the point I rarely kill them. But even trying every precaution to keep them alive they either have no change if they lived, or if they "died" without removing the head, their actually dead and a new Captain takes their place. It's a bit frustrating to keep having to hunt down new Captains to experiment on.