There is something I don't understand about the epic quest .
My main are Jin Iori and Orochi Iori . All of them are level 90 with full core bored and 99 attack defense etc with the capsules you feed them .
However when I am at the boss of chapter 3 ? And it keep saying my power is too low . And fair enough I get my ass kicked easily . How do I increase their power levels already above mine ? Hell I even feed them -_-
If you notice, at the stage select in Epic Quest, you have these stat buffs for Atk, HP, and def. You will also notice that it shows "bonus reward" fighters at the bottom.
You're supposed to raise these stat buffs (and strategy buffs) in order to give you characters enough stats to take on the absurd power requirements of the later chapters/stages. And I'm not talking about raising the stat buffs to level 5 or something. I completed Epic quest completely and my stat buffs were around level 45 or so for each.
You raise these 3 stats by either:
1. Grinding stages you can do (preferably on auto) with the bonus reward units somewhere in your party (having them as strikers is what I do). If you did those Super Missions that gave you free units, you should have 2 out 5 for each chapter sans Chapter 4, where you'll only have 1 out of 5. These bonus units will give you extra of the stat buffs xp and strategy buff xp that you get at the end of a stage.
2. Do the daily Episode Missions for each chapter that give you 100xp of each stat buff.
3. Buy the 200xp buff items from the secret shop anytime they show up. They cost 20 rubies.
It will take a while and cost a lot of AP. It's the main thing you're supposed to go back to in this game (if you don't care about PvP that is).