Infinite XP Loop?

[DracoWolf92]

I believe I've found an infinite XP loop that I can exploit. It goes like so:

I am in Act II, and I have found an enemy Captain that has the vulnerability "Mortally Vulnerable to Stealth." Normally, I can just sneak kill him and be done with it.

What the game doesn't tell you is that you can Stealth Dominate a Captain without having to Break him first if he has this vulnerability!

If found that if I Death Threat him, making him gain 5 levels, then Stealth Dominate and Shame him, he loses 5 levels.

I know that eventually he'll probably go insane,or worse Maniacal, but even if he does, he's still gonna be Mortally Vulnerable to Stealth, right?

The missions I do on his Death Threat keep giving me XP, no matter how long I've been at it.

Is this exploitable? Are there any other issues I should be worried about?

EDIT: I should clarify, the main reason I'm going after this guy is to get at his Blood Brother, who's a Warchief's bodyguard and won't show up until I'm fighting the Warchief. I have a personal reason for taking this guy out.

[Pandora]

Wow no need to waste time with him, vendetta are enough for xp. Dont think he will lose his ties but eventually another cap could decide to execute him (Sauron blesses blood brothers executions). No issues otherwise. I would have kill him xd.