To be perfectly and brutally honest, it'd probably be a herculean task to actually succeed, initially. Almost every target of sufficient size is also competent and can work together. This would be a fairly new entity with little experience with each other and most likely outnumbered to boot. Underhanded tactics and moral victories galore, I suspect.
Still, that sounds pretty acceptable actually, Tab. No friendly relations with slavers is a fairly reasonable demand though. There'd be no limitations on any other affiliation or loyalty, as long as ending the slavers remain on top of the priority list.