I think they intend for you to do the side dungeons they point you towards during the camp scenes first. The thing that truly busts the game is Lumina points, so limit that to 75-100 per character and the game will stay balanced at least on normal.I think the Pictos that uncaps the damage cap is the thing that breaks the game. Prior to that the game is balanced around having a 9,999 damage cap but with it gone your damage output goes well into the millions.