Try to have all your spells at level -ga, it help a load, Tinkerbell is uber in this fight and things are way fun with your weapons special abilitis Arts Arcanum and all those other combos! woOt! Climb on her back when ever possible, you avoid unecessary damage and use glide, GLIDE FOR THE LOVE OF GOD! when she uber attacks the group. Good luck ^_^ I died like 20 times and threw things around the room before this worked for me.