I've been trying this but can't seem to climb through all the JKRs in my arena. But I don't ever drop more than 5-10 ranks either.
Using Padme, Anakin, GK, Ahsoka and switching between 3PO and GMY. I don't have any G13s, but neither does anyone near me either.
Is there a trick to beating JKR with Padme?
I usually focus the GMY to trigger saviour, and then go after Jolee. It feels like 90% of the time I'm trying to hit my courage hits into an enemy with foresight.
Arena with C3PO
https://swgoh.gg/squads/166521/
Arena with GMY
http://swgoh.gg/squads/166522/