For anyone who having a trouble with no Cooldown, turn on no AP cost 1st THEN no Cooldown before fight. I usually use P.O.W. Rescue as testing place to see if it work properly (since it cost no energy and can retry as many times as you like)
Please remember that each cheat would activated for both sides. So if you got no AP cost, enemy got that too. If you can spam special, enemy can do that also. You just get random AI for each fight so sometimes you fight AP spam AI once in a while.
Also you would crash/closed each time you level up. Get used to it if you use new account.