phase 1 - CLS and zolo. Escape them both out to use for later phases
Phase 2 - HK, 88, 86, JE, CN. Not the best, but I still use for around 1.5 mil in p2
2nd team - Wedge, Biggs, zolo, r2, CLS
Phase 3 - I run teebo, jyn, Chaze, nihilus
Phase 4 - zody, clones (minus Rex) and leia
Those are the teams I run (working on a zader DOT now for p2)
Resistance (Finn zeta) is very good for phase2, but I don't have them yet.
Once you have the teams, mods are super important. Mods are most of it. For instance, with the droid team I use in p2, without mods I can only get 150k damage. With average mods I get 1.5mil damage.
Speed arrows and speed secondaries on everyone, unless they don't need them. On my zody team, I have Cody and leia modded for speed, all the other clones have normal CC/CD mods
Good luck and remember it's mostly about mods