If you're farming for
Shadowfang and
Assassin's Blade you need not go all the way through the instance. You can stop just before
Fenrus and run it again and again and again until you get your drops. I used to farm SFK with my hunter and warrior. Shadowfang dropped once in about a hundred runs. I never saw Assassin's Blade.
I think your hunter can go up to Fenrus somewhere before level 40 provided you have a bird with screech. You want a pet with an AOE that'll hold the mobs while you heal your pet. I suggest a carrion bird for the extra armor.
If you want to complete the whole thing and kill Arugal, your hunter and pet need to be level 40-42. The four worgs in the room before Arugal will burn your pet down otherwise.
Edited, Jan 16th 2008 10:52am by ItsaGaAs