Love being a warlock... your not required to hold the aggro, the medical status of the rest is not your business, the mage must see to out dps you, you don`t sap.
Occassionally a banish or, for fun when the party is good enough, enslave some demon and send it against the others (like the keycarrier in Ara, still love that fight) and keep an imp out for stamina and an SS to keep the healer happy.
Life is great in the dark way of the force