Something I've learned as a rebels user is beating JKR isnt a guarantee, at least for me. I think I have about a 90% win rate after adding C3P0, which is up compared to the 20% before haha! I wouldn't try JTR, i recently gave it a shot and it was a total mess. ZFinn was a tad better but R2 is actually key here, and the best lineup so far is CLS/Han/Chewie/R2/3P0. Thankfully 3P0 is tanky enough that even a 6* will have more health/protection which leaves CLS under chewie guard.
As for modding, turn order etc i feel like everyone has a different roster/mods and has their own meta depending on their shard. Just follow the basics with speed trumping all, focus on making sure CLS is under guard and if you can throw as much potency on 3P0 as possible. You'll want to trigger savior asap, so focus down GMY if possible. I try to get buff immunity on GK asap, and once savior is triggered your #1 goal is to take out Jolee. From there it's all just about opportunity, focus down the weakest enemies and you're golden. The only turn that changes from fight to fight is smoke screen, if Revan hasnt marked before R2 goes ill throw up a smoke screen keeping R2 visible.