Leia isn't very good, especially on defence because she'll just go stealth straight off the bat. QGJ loses his effectiveness when not as leader. Your best option would be dooku (L), Rey, GS, and then a choice for the last 2 spots of daka, RG, FOTP, poggle, lumi, RP and possibly yoda. This is assuming you're P2P because you mentioned Leia, so I assume you're a whale. You could run one of the most annoying teams with dooku, Rey, GS, daka and RG. That's probably your best option if you were able to work towards it. I know I'd struggle to beat that with my F2P team of QGJ (L), Rey, GS, lumi, and dooku.
Replies
Dooku 5*
GS 5*
86 6*
daka 4*
RG 4*
As free to play January shard but I stick with my phasma FOTP Daka RG lumi for fun.
Top 50 arena player.
I have a 3* leia but she isn't arena ready. From GW her and FOTP Dooku make for a lot of fun on offense though.