It depends, if they super him from all sides with atheon, crota, skolas, and oryx leading their troops giving firing support and the queen and cabal navy bombarding the battlefield, then they (maybe) stand a chance. But let's be honest, half the people who play destiny aren't smart enough to take part in that, it's still awkward between oryx and crota after oryx found Crotas secret stash of nude wizard picks, and the cabal and vex will never get along