I cant really believe that, thats what i use with my perma-9 and it 3stars quite often, but yes without heros it can go wrong. I never loose actually, but under defeat I suppose you mean 3stars not 2. I see you have th11-accs. So up the loons/lavas and the haste and try to get max. bowlers and giants too. That should definitly be enough to mindlessly smash th9s without your heros.

