Okay, I'm gonna do my own analysis on this. Skolas is dead. He's a mortal facing the equivalent of gods, he's dead. Atheon, as much as I like him over the others, is pretty much nothing more than a glorified gate lord outside the VoG, so he dies to the other two. Crota and Oryx... The battle ends in a stalemate. Because of how the Hive work, especially Oryx and his "family", they can fight and kill each other as much as they want in the mortal world, but thanks to their throne worlds, they can't truly die unless you go there and kill them again when they're much more powerful but vulnerable. So, if it's only outside their domains, then it ends in a stalemate.