You cannot truly balance power/skill to 1:1 rate.
It has 3:1 rate with eye and 4:1 with horn.
Main skill sources is relying on skill during battle and trainings with Michael.Plus few from other sources like regular training or other.
What about the side routes? Can i complete them all alongside the main story requirements like the eighty something power points I need to defeat valvarn?
If you don't skip like going to gloryhole, yes.
But remember to do training first.
Ok prioritize training then hang out thanks mate