If channeling the TP near SG would cause his wound to bust open and make him comatose, then he wouldn't be able to kill the DO or seal the Bore or whatever. And since we know the good guys will win, then that doesn't seem likely.

I suppose he could do his big magic, and the thing could bust open while he was doing it. And he could complete the deed and only then double over and go comatose. But since we have the prophecies of him standing on his own grave and wandering around blind and stuff, I'm guessing he survives TG, if a bit beat up.

I keep thinking "his blood on the rocks of Shayol Ghul" will be one of those pesky ways in which the words of prophecy are accurate, but mean something other than what we assume. Like maybe the Aiel are "his blood" or maybe Elayne's baby is "his blood" or maybe, like you say, his wound busts open on SG and he bleeds everywhere, but it doesn't kill him.