[andrewas]

OK, two points. First up, you can find some assistants in one of the rooms to the north west. They should make the fight quite easy, but ive always saved them for the next stage.

Second, the best place to fight is in the entry chamber since its the only one where you cant be attacked from behind. Small advantage but you have to take what you can get.

As for the fight itself, the standard buff spells should get you through. No notable enemy weaknesses for this one. Have some fire/acid for the trolls though.

If you need anything else post your party detais, its hard to advise you when i dont know what you have to work with.