The 3 box that works best for me (rare that I only 3 box, more often 5) is Sham (slow, some dps, pet dps, some heal, buffs) add in SK (snare wep, dps, get/keep agro, stun) then invite Cleric (heal, stun, root, some nuke, buffs, rez). Each of these classes does more than that but these are the...