Who to farm in cantina store

The great thing about cantina store farms is they are quite quick, so when you start working on a faction you can start the cantina farm then and it will be done by the time the slower farms are, so it depends which you want to get first, a nightsister or Padme team. If neither are priority, it might be worth considering the Hoth Scout just to get entry to the TB battles if you are doing Hoth and help your guild, or get Bistan for the U-wing if you are working on BH ships for a Rebel fleet. Basically it depends where you are going next, your separatists have quite a way to go, as do your galactic republic, so Ahsoka may not be a big priority until Padme is closer ahead, whereas nightsisters can serve a purpose at quite low gear. Beyond those 4 and Cassian's ship, I'm not sure there are many you don't have that are useful farms until you just get to the point of completing them for the sake of it.