Had this problem before with Shiva EX when trying to farm the weapons. Got really aggravating fast because of noobs who didn't know how to play their classes right or dodge, so we were either wiping due to not enough DPS to burn down her adds DESPITE i120+ players or to her various moves because the healers couldn't keep up the tank (due to the tank sucking or the healers sucking). There's a reason why a stereotype has formed where high geared players = noobs.