1) Shoto and Bakugo ain’t doing much, they get one tapped, though Shoto can maybe scorch Supes to nothing/freeze him solid with Phosphor if he starts with that. They are not relevant for this fight.
2) Difference in speed is 3x vs Shoto and Bakugo, way less vs Deku due to his speed scaling, meaning Deku would adapt fast as hell since it’s not enough to blitz + he has precog. Analytical Prediction reads Supes like a book and he gets grabbed with Blackwhip which destroys his only advantag. Then Deku uses Gear Shift and violates.
3) Overdrive one shots
Supes best way of winning is going for Deku first and hoping he takes him out before Deku just touches his hands together and starts reacting to him enough to one shot with Overdrive. Analytical Prediction also makes that near impossible cause Deku will start reading his moves and countering within seconds while not going down from any of Supes punches. Class T LS so Supes can’t restrain and if he gets read even once and grappled it’s over.
His dura neg prob won’t work due to Deku’s heat resistance, unless it surpasses it, in which case he would have to start with that and hope Deku doesn’t just Precog dodge. If he just tries to punch Deku down, he loses.
Shoto and Bakugo can’t do much, especially Bakugo, but Shoto at least can nuke Supes with Phosphor if he doesn’t get one shot and Deku distracts/grabs him.
So Deku FRA, Shoto and Bakugo on cheerleading duty.