Going with Mutants pretty much 10/10 due to Quicksilver. No one on the other team will even see him so he keeps everyone on his side alive while Magneto provides the offensive power and everyone else just has to stall a bit.
Homelanders beams are going to be the most dangerous this here but if he doesn’t manage to hit Mags immediately(which quicksilver should prevent and prioritize due to being his pops and all) then Mage literally wraps everyone in a mass of metal and crushes them all(not a single person on the supe side has shown the ability to resist even a fraction of the force he can put out).