I did the "Maw of Mazauk" quest but whenever I return to where Mazauk is supposed to be (half way between Lugazag and DG), he's never there. I returned to this area more than a half dozen of time.
I understand some quests require that the area be owned by creeps to have the quest giver be present but here, Both Lugazag and DG are owned by creeps each time I went there. Mazauk is never there. There just a bunch of NPC wargs there.
I also understand that Mazauk can be killed by freeps but I supposed his body should be there lying somewhere like when Gorgoris is killed, her body lies there with a quest Ring above her head. But here, there is nothing like that.