I managed to edit and freeze ATB and HP midbattle, but always have to redo this for every battle.
Just use an Emulator, use 4byte search using Cheat Engine 7.3
(7.3 CE works 100%)
I use LD9player Emulator and pick the headless Process of it.
In growth screen, you can edit the stat boosts after unlocking a new stat node, scan for the new value, redo it till u get 1 result, change it to 99999999 and freeze it, dont delete the Adress you freezed.
Now u can 1 hit all content exept crisis dungeons, the stat hack somehow only works for 1 or 2 battles because of the debuff of mob/bosshits.
*(Note)*
The Stat Hack will Permanently Show your Total Power Visualy to your friends and anyone. And you cant change that ever again. So dont do it if you dont wanna risk anything.
Im lv.36 and no ban, so we are kinda safe to use this method.
Enjoy guys and girls!