if a good party of mages are put together, and know each other well i dont think they can be beaten. necro+sps+sts+sws+bd+ol+bishop+ee+ee i think, or maybe trade EE for another sts if it isnt a long fight/siege. mages assist on necro who glooms target, sps cancels, and sts damages. with those debuffs on a target sts can 2-3 hit most targets.