Help determining team/focus

Hi everyone, been playing for a little while now and am starting to get stuck on what my next moves should be. Im level 48 and dont pay $$. Ive made it through GW a couple times and would obviously like to be able to coninue to do so as i level up.My characters are:

Phasma 4* lvl 47, gear 5
Chewie 4* lvl 47, gear 5
Sid 4* lvl 47, gear 5
JC 4* lvl 47, gear 4 (lvl 5 not possible yet)
Lumi 4* lvl 47, gear 5
Jawa 3* lvl 45, gear 4
Luke 3* lvl 44, gear 4
Talia 3* lvl 44, gear 5
Res Pilot 2* lvl 39, gear 4
Res Troop 2* lvl 39, gear 4
Royal Guard 2* lvl 39, gear 4
IG-86 1* lvl 39, gear 2
Snowtrooper 1* lvl 39
FO Stormtrooper 2* lvl 38
FOO 3* lvl 23, gear 2
Hoth Soldier 3* lvl 19, gear 3
Hoth Scout 3* lvl 2, gear 1
Ewok Scout 1* lvl 4, gear 1
Lobot 3* lvl 1, gear 1
Han 3* lvl 1, gear 1
Biggs 2* lvl 1, gear 1
Clone Sgt 1* lvl 1, gear 1
FOTP 1* lvl 1, gear 1

So I can level up either Han or FOO (maybe FOTP if I can everemember star him up), any advise on which?

Working towards leveling Lumi in GW, Sid-arena, and getting Daka in catina. I'll probably lvl phasma again after Lumi as well. Which main characters should I continue to train (most of my garbage troops leveled where just to continue battles)

Any general/squad advise is greatly appreciated. Thanks!