@cor3zone
Let's assume he activated every positive (he also got some negative like 'weakness to XXX' from the skeletons as an example) and used them.
Against who and why is he fighting them?
He doesn't really have any reasons or motivation to fight someone 'til the end, he fights to improve himself and his group.
And he wants his group to behave like a mercenary group, and if they fought a lot of people or he provoked a lot of people, that wouldn't be as easy.
And there are heroes as well (although those shown so far haven't been a match to his full-power use), but there are likely to be other heroes and powerful beings out there, he currently has no knowledge of nor reason to fight.
But frankly, if he went and used his OP powers as he wanted, someone would try and stop him, which could lead to him losing members, losing possibility to move outside in the open and if taken far enough, might lead to subjugation towards him.