General

BWs will be awesome in non-elevoid parties

Spirit of Flame: Summon the spirit of Flame (you can choose one of two appearances). While summoned, your mana costs will be increased by a certain percentage but attacking Ignition affected enemies will reduce their resistances and you will ignore a certain percentage of their defenses. (max level: 30)
Level 1: 120% mana cost increase, Ignition will reduce enemies' resistances by 71%, ignore 1% of enemies' defenses, 300 second duration, cooldown of 600 seconds.
Level 30: 120% mana cost increase, Ignition will reduce enemies' resistances by 100%, ignore 30% of enemies' defenses, 300 second duration, cooldown of 600 seconds.

Half of the time, your entire party will ignore all elemental resistances. This is fantastic.