Seems like each level is just a massive leap in power. Able to auto run l2 with the B string, beat l3 with the A squad, and maybe barely squeak by l4 with an OP friend. One thing that would make this game awesome is taking exp from maxed out monsters and giving it to the team, just like it does with friends. Instead, I'm encouraged NOT to used maxed out monsters. I have 5 maxed out 3* that I can't evolve, since you need 3 more 3* each to do that, but I also try NOT to use them, since I lose exp by doing so.