Oh, so you want to solo Keeper of Halidom on level 64 Warrior? You're going to need a full Racc setup, Squid Sushi, /nin, and like 4 stacks of Bloody Bolts. Better hope to god he doesn't paralyze you! D:
I'm stubborn, though. For some reason I actually enjoy soloing. So, I'll toss on a stimpack, make my NPC attack first, then prep up a medpack while I fight whatever's in my way. After helping a friend with his final boss though, I have a feeling I won't be able to solo him (my guess is Darth Baras).