Supers don't do much damage to Atheon. Its called damage per second. Shooting him with rockets and then switching to your sniper or primary do more damage. Using your supers are waste just because it takes to long because of the little cinematic your character does. And the only characters that can actually hit Atheon with supers anyways are the hunter and warlock. Fist of havoc is just dumb to use on him unless he's almost dead. I jumped in HM VoG with randoms and they told me I couldn't use my gjallahorn. I just laughed at them and so did a few others. We all pulled rockets out and beat Atheon on the 2nd teleport