How to stay relevant in Arena

You may want to try a wiggs lando rebel squad you won't want Lando to use his aoe without r2 putting him in stealth against phoenix until you take out kanan. Leia and stormtrooper han can also work in that squad and are fairly easy farms plus they are needed for cls. Just working in the realm of rebels will keep you viable for quite some time

All the characters mobewan mentioned are good to work towards but Darth Nihilus and baze are long hard farms and starting chirrut before you can start farming zetas reliably will use your fleet currency which will slow down your ability to get zetas