God King battles are REALLY hard and you have to do 3 of them. First your mode is essential. I'm on hard mode and beat them about level 50-55 for everybody. In other modes it could be lower but it's strategy you need. Benoit should damage it's defense with Wind Hand and Karine ABSOLUTELY MUST SCARE IT. That lowers its attack quite a lot. Abu can cure things it inflicts with demolition. Karine should cast Fighting Spirit after successfully scaring it. Casting Martial Mind with her before the battle could raise her evade and that is very useful as well. Other than that, attack all the way