We want to break a relation with someone who we are not in a strict pact with, like the Sith, Jedi, and Omega. They could serve our butts on a silver platter with how many alts they have there.
as for the others they dont have so many, and are short on men (PC) so it would be a more logical choice to take out one of them.
now we need to think of a place where we can get closer to the others while keeping out distance. The Sith are way to far out to be of any large worry, the Jedi and Omega are very close. as such if we were to make ourselves expand out to where AE is now we could have a tactical advantage by way of having a pillow between our Capitol planet and theirs.