Completely agree! there's definitely not an op build you can build in this game. Damage wise, you could say that a build that buffs melee attacks would be the strongest, like charge weapon, paired with song of storms and cleave, since they deal the most burst (you can one shot most enemies if not all and it's aoe), but it takes three full rounds to be able to do that, while a spellcaster or warrior build, even though you don't one shot, just being able to lash out damage immediately, makes it so the fight could end in three rounds as well. Just a simple example, but if you test out builds while playing, you're going to notice everything is pretty well balanced.