I assume your talking about Vatgit (Vokdek is easily solo'able).
Some clues to fighting Vatgit. Make sure you take out all the others around him. Once Orcs link, kiss your but goodbye.
I solo'ed em' Even Match at 16. Open with Slow (He's amazingly fast), and lather on some para and blind. If your enfeeb is high enough, You might want to think about opening with a bind and Water-nuke him from afar. Since the battle is going to be fast paced, use cure II instead of cure (you don't wanna' devote too much time into yout curing).
All in all, it is a good idea to find others in the area to help you out (kind of hard sometimes since parties on the Warchief plateu are rare).
Good luck.