I’m in the same boat you are right now, I’ll tell you my plan so you can see if it would fit your situation any.
My first step when i created my account was 7* rebels for Palpatine. I now have palpatine 7* so next on the list was Thrawn. I started farming Phoenix after rebels but unfortunately I was only able to get him 5* this last time around.
So, originally the plan was to have Palpatine lead, Thrawn, Vader, Tarkin, and TFP for R2D2 but now I have to substitute RG for Thrawn.
Currently, I have Kanan, Ezra, and Chopper maxed. So my farming plan is from cantina to get Hera done (~40/100) then get TFP & RG up to 7 together (get both to 5 first then both to 6, etc) just bc even if I can only get them to 5 by the next R2D2 event, 5* R2D2 is better than no R2D2. From Squad Arena I’m currently farming Tarkin (~40/100) then I’m going for Leia. And I’m farming Farmboy Luke and Old Ben from guild store together. Luke is ~30/100 and I’m still working on unlocking Old Ben. And I have StHan maxed already so then that would complete my toons needed for Commander Luke.
I know for a fact I won’t get the new Rey the first time her event rolls around so I’m just going to farm First Order where I can to get BB8 and the rest just whenever.
sorry for the essay, but hopefully my plan lines up with something you were thinking of doing.