Well, at this point there's also no way that the Angels will win unless the Machina are so big sore losers that they prefer to pass the victory to the Angel's instead of the Demons.

EDIT: Of course, the Machina still can win if they manage to kill the renaming Angels (Tartys and Dora), since there are no Demons capable of fighting anymore, this means that cooperation is kind of counterproductive.

Let's just see what will happen.