If the heroes are too much for Boros you can add in perfect Deep Sea King to his side:
Go!!
MRM
MrMindSenior Member
wut? Boros one-shots
none of class s can generate close to planetary attack
he does what Garou did, only faster
NEW
NewGuy01perpetual
Boros probably wipes the floor with them, but in the event that he lost, adding DSK would change nothing. Several members of the S-class could slaughter DSK just as easily as Saitama did.