put some tesla armor on him and give him a plasma rifle, you'll be able to get his stuff that way without killling him, i just kill him thought to get his stuff, its easier that way, but he is cool.
well yesterday i returned to teh ship with a fully repaired shot gun and he was all glitched out his skin was invisible all you could see was his eyes and armour and sword
so i pulled out my shot gun 6 herad shots in vats at close range later he still had a bit of health i had to finish him off manually and lets just say he had a very messy end (not as messy as it could of been tho i dont have bloody mess)
if his armour breaks what can repair it ??