Don't get distracted by the scantly-clad succubi. They'll fire magic at you very quickly, and in large amounts, as they tend to travel in packs. You need some major magic resistance to get rid of these pests. (Something I've noticed: if you Magic resistance is at Max, most [80% or so] of the Succubi attacks won't hit you)

Rouges need to pack some kind of fire arrows, as only the Soul Burners can stand fire (unfortunatly, they are immune to it, so you'll need an alternative). A warrior will have a hard time, as succubi tend to run away when chased. A sorcerer should use staves, as not to drain his mana too quickly. A sorcerer can use Stone Curse on the Succubi, and then the Warrior or Rogue can take them out.