Aggressive Negotiations Tier 5 Helppppp

Trying to acquire :

Chewbacca :

I upgrade my Bounty Hunter on and off. I have to start grinding Bossk but he's still far away from 7* so maybe I should stop investing on my BH gear for now?

Bobba Fett LV 85 G9 +2 7* No Omega No Zeta (Ability all LV 7)
Cad Bane LV 70 G8 +3 7* No Omega No Zeta (Ability all LV 7 except is Lead that's LV 3)
Greedo LV 70 G8 +1 7* No Omega No Zeta (Ability all LV 3)
Dengar LV 72 G8 +4 7* No Omega No Zeta (Ability all LV 3)
Bossk LV 70 G8 +3 +1 4* 0/65 No Omega No Zeta (Ability all LV 3)

C3PO :

I started buying every Ewok I can find in the store and yesterday I upgraded all their gear to what I could without farming anything
ps : All Skills are LV 3

Teebo LV 52 G6 +5 (6* 56/100) (farming him in GWS)
Ewok Scout LV 50 G6 +5 (6* 30/100)
Logray LV 53 G7 +3 (4* 52/65) (farming him in Guild Store)
Ewok Elder LV 50 G6 +5 (5* 83/85) (farming him in Guild Store)
Paploo LV 52 G6 +3 (4* 59/65) (farming him in Guild Store)
Chief Chirpa LV 52 G6 +5 (3* 14/30) (farming him in Cantina Battle)