Mage (caster)
Stats: All into int.
Abilities: Piercecast, Pillarcast, Powercast.
Gear: Int weapon, Int armor, EE charm, EE heal charm (try to always carry one even if you focus on dealing out damage)
Mage (healer)
Stats: All into int.
Abilities: Multiheal, Salvation, Powercast (only if you carry damage charms with you)
Gear: HM weapon, HM armor, EE heal charm, EE charm (optional)