DEATH: EMPOWERING: Firestorm can use Steal Energy with close and ranged combat attacks. When an opposing character is KO'd, heal Firestorm of 1 damage. If Firestorm has healed either way this turn, he can use Perplex and Probability Control until your next turn.

Suppose he has an action token on him already on click #1and I push him to deal damage.

He pushes and then heals via Steal Energy?

Or is the healing immediately applied before the push is applied, hence he'd still land on click #2 after all is said and done?

Thanks in advance.

No. Steal Energy activates when the opposing character is damaged, before the action resolves. Pushing damage occurs as actions resolve. The healing would occur first and, if he is on click 1, it would be wasted.

This right here

Thanks, NV.