I'm on chapter 13 now but my guys only have like 5000 to 6500 hp which is so little. How do I get to like 20000 to 30000? Is it possible to get to 99999 like ff10?

As for the CP, how far can the cp lvl go up to? is lvl 4 the max?

As for accessory, what should I wear to make my guys invincible? Some guy said you should definately equip auto-haste but I don't know how to get that. You need 'dash shoes' and upgrade that but I think I sold it. Can i get it from somewhere else? Help me plsss.