The whole point of PP is to be #1 and see your enemies scattered before you
No, its to crush your enemies, see them driven before you, and to hear the lamentations of their women!
Seriously though, it doesn't matter. Every power bar one could gang up on the remaining one, push them back to their core system(s) and then.... nothing. No way of finishing them off. That's why power alliances are meaningless. There is no way to "see your enemies scattered before you".