Yes, they should be compatible, though with the disclaimer that I have not tested them together. Looking through PartySwap's file changes, it modifies nothing specific to Nar Shaddaa, while this mod was designed with compatibility in mind even with other Nar Shaddaa-specific mods, so long as they do not change scripts or dialog specific to the airspeeder. This mod also makes no changes relevant to the Handmaiden or Disciple, so it is safe to say they deal with separate areas of the game.