the limiting factor is not human. Its just that to fight against four other guys there should be a lot more bonuses than just pl. There should be higher speed and hp and amount of ki, as well as the higher pl. Also, if youre the person playing against the other 4 or whatever amount, they shouldnt be able to throw you back with melee. He has to be near impossible to beat in 1 vs 1, not just higher pl.