In spite of the Scarab's power, Jaime knows waaaaaaay better than to try to take down Superman without a decent plan, especially since there are more experienced superheroes around who'll do the bulk of the fighting. He'll instead be opting for running people out of Kal and Jor's line of fire! He's speedy enough to make a decent enough retreat, and he can also simulate Kryptonite with his armor (July, Al, I'm gonna check with you on this one so it doesn't get too OP/mess with the order of the plot).

SO WHO WANTS TO NOT DIE.

(as a note! Jaime will be coming in later when the vast majority of the damage has already been done-- he's only bailing out those who weren't initially slated to die.)