[Micah]

Seconded with Jeff's less lazy answer. Army of gold in particular makes fire storm almost completely ineffective between the FR and the extra protection. SCs and thugs can also enter into it, and mass regen + heavy armor + fire fend or the like should keep the damage down to a reasonable level since it won't stack up over multiple turns if you're regenerating. Add in a will of the fates and it should really cut down on how much damage it does.