Apoyheosis Veil and Heart of Praxis fire turn sunsingers into two different kinds of nasty. That, and since sunsinger can obtain two nades, raid chest and feet gear offer bonuses to special and heavy ammo respectively, armamentarium is negated by basic high level gear. I can agree with intraclass imbalance. Why use sunbreakers when praxis fire is just better, Discipline and MORE nade spam is superior to longer grenade duration of ONE grenade.