Okay, I've found a bypass to prevent getting banned.
Steps:
1-Use the mod to increase your flooz ONCE!
2-Spend all your flooz to whatever you want (most probably for hero chests) until you can't spend anymore.
3-Exit game, open app info, force game to stop, delete/clear data.
4-Open the game then do step 1 to 3 as much as you want.
*IMPORTANT* Dont increase Flooz more than ONCE per cleared data. Clear the data first before increasing flooz again.
Note: I don't know how this works, but I've tried increasing the flooz more than once even if its just 2x, I still got banned. But with this I prevented my account from getting banned. I've discovered this by trial and error using an android emulator.
EDIT: Just tried increasing my flooz using the skill slot increase, got banned. DON'T USE the skill slot increase, only the hero slot increase works!