I've never found the right answer. I either throw RP to the wind and set up the fairest fights I can (under the pretense of "avoiding friendly fire", an incredibly weak excuse that works if you're keeping a battleship out of a snub brawl but much harder to deal with for a snub entering a snub fight) or I throw "fight balance" to the wind and acknowledge that, inRP, any hostile force in Liberty would be immediately engaged by any ready elements nearby.
I don't know, I've tried both and neither of them has ended in desirable results. ¯\_(ツ)_/¯