I would also like to inform you that in my arena shard (where also lvl85 g11 Zaul / Zihilus teams are present) still a FTP player rocks with his lvl84 Lando (L, g11), Wedge (g11), Biggs (g10), STH (g11, 207 speed), Boba (zeta, g11, 208 speed), CD set on Wedge and Lando.
Within multiply tries with several different comps I was not able to beat him. However I must say I am a little undergeared (Wedge and Boba still g10) because I geared Rex (g11), SF (g10), EP (g10), Maul (g9) and Kylo (g9), so really be careful that you hit the gear upgrade when available. I must say I underestimated the g10=>g11 difference and also I have no CD sets. So when you have the Jedi challenge mastered, maybe invest some 15 crystals in refreshes for mod shipments to get such a set ready.