When looking at a lot of the 4 ship rebel builds they tend to be a toolbox style with each ship having a specific purpose in the squad. This idea is what I've built this list around, four ships that all serve a specific purpose in the squad.

Poe Dameron - VI - R2D2 - Autothrusters

Role: Ace Hunter, End game closer

Bandit Squadron Pilot

Role: Blocker, General nuisance

Tarn Mison - R7 Astromech - Integrated Astromech

Role: Consistent Damage, Backup end game closer

Gold Squadron Pilot - Ion Cannon Turret - R3-A2

Role: Control

Run these ships in a loose formation with Poe flanking but not too far away that he cannot support his squad mates or receive backup in a hurry. Poe is your Ace hunter and the guy you want to try to keep alive till the end because as we all know Poe one on one is a nightmare for the opponent. If Poe does get taken out quick you do have a backup closer in Tarn and his R7 shenanigans. Tarn also provides you a consistent 3 dice attack and is tough to kill. The Bandit is your basic 12 point blocker. Throw him into opposing lanes and just try to make pileups and strip actions. The Y-wing is your control ship but it allows you to ion and stress a ship. This effectively takes them out for two turns because they have to do a white 1 straight to clear ion and then a green maneuver. Allowing you to either focus them down in those two turns or just ignore them and get back to them after killing the ioned ships friends.

Any feedback is appreciated.