The leave you one shot if you can evade all the incoming bullets, or you're dead if even one shot is put into you. Then the burn takes care of the rest. Definitely OP because all you need to do is pump a shot or two into someone, throw the firebolt, and then you can run away like a pussy while you let the burn get the kill for you. Takes up two perks? Sure, but who's really going to use angel of light? Who's really going to carry 2 grenades when you can have one with extra damage?