I've been using the mod from iosgod for a month now and this is the first time has someone warned me about the ban. I think as long as you don't play Hero Duel mode, you'll be fine. I keep switching the mod ipa and the actual app back and forth every day, maybe that'll do the trick of not getting banned. Just don't do anything suspicious, other players won't report you for violation of using the cheat.
I like the mod from TheArmKing because it has Enemies do 1 damage. iosgod has freeze enemies but they didn't modify some monsters that can release projectiles after they died. Their projectiles have OHK too so there is no way to survive if you eat their projectiles. iosgod also has Hero OHK but better than TheArmKing. The toughest bosses so far took only 2 projectiles to kill.
Yeah, thanks for the warning. I hope I am not the next target. Have fun players.