All these strategies for soloing him are clever, but waaaay too complicated. This is all you have to do:
1) Invis/camo.
2) Go in cave.
3) Target Ghowlik or his PH (sonic wolf packleader).
4) Run outside of the cave and stand high on the wall off to the right of the cave entrance.
5) Cast any offensive spell on him.
6) Walk away from the wall back out into the open. Just stand there for 5 seconds or so. Ghowlik will come running at you all by himself, with no adds of any kind, and you can easily pull him to an area with no wanderers.
I see all the posts saying how this strat doesn't work anymore... but it does. I killed him 5 times today this way, in addition to maybe 5-6 PHs. Even did it with defenders up, and didn't aggro them. Got two of these items and three jawbones, as well as a bunch of the useless 6/24 sonic wolf teeth or whatnot off the PHs. This is a surprisingly nice item for such an easy camp... I guess it just reflects the relatively low quality of droppable non-high-uber shoulder items out there. Tattered Mantle is still one of the best items in this slot for a large price range... how many other Kunark items can you say that about?
Edited, Sun Jan 4 23:49:25 2004