Scarlet Sorceress has an all-multiple arsenal and a high albeit unreliable damage output, with powerful heals and extra damage reduction. Needs spellscrolls and potions for optimal usage.
Chaos Slayer can dish out some pretty amazing numbers in the long haul but it has an unreliable heal and a debuff which can make the enemy deal 500% more damage. Which won't kill you when farming mobs per se, but it will sting. Needs Health Potions for optimal usage.
Shaman has two mutli-target attacks one of which heals. Needs Mana potions for optimal usage because off-model.
Legion Revenant has good multi-target damage, good heals, good buffs but some extreme requirements.
Troll Spellsmith... exists too, I guess.