I just fought a 5* unduped mephisto on node 22( all or nothing node) with my Iceman, after mephistos first sp3 his aura of incineration didn't stop the whole fight . There was no timer on the aura logo. Because of this he was constantly gaining power. I took like 4 sp3s from him but luckily due to ice armour I survived the fight.
@Kabam Miike pls look into this