Well, in pretty simplistic terms, I would suggest the following kill list:
House lawfuls: the remnants of the old enemies.
House corporations: the filthy bourgeois that go against the values of "The Revolution", and support group 1.
Corsairs: Opponents of your closest friends, Hessians and such.
Other folks should be more open ended, and evolve depending on the circumstances.
I mean, you probably would have no beef with Farmers Alliance or the Blood Dragons initially, but but their anti-government views probably wouldn't be enough to make you consider a longtime ally, since they also have a political agenda that goes counter to the Coalition goals.
Giving Coalition a line against pirates just because is somewhat akin to making them good guys, which I don't believe is what people want from the Coalition. Give that to the bounty hunters or something.
Edit: Expanding on the Kusari front, you will probably find many enemies and little to none natural allies. You would need a new conceptual pirate faction representing left wing farmers and workers to even consider having a persistent allied group in that region. IMG could give you base support, but they are not properly "in Kusari".