Usually the mage, preferably of the jack of all trades variety with a focus on conversation and buffing/debuffing (i.e. the bard) Nothing funnier than watching the stunned/dazed/blinded/cursed/hypnotized/slowed/weakened/feebleminded/entangled/petrified/paralyzed/frozen solid/all of the above big brute of a monster flail through molassas at the spot you were standing at an hour ago while you set it up for the finisher. Buff/debuff magic is definetly the way to go.