If you're trying to stay all scoundrels
Lando (L)
IG88
Dengar
STHan (Speed Mod)
Chewie (Health/Protection)
I don't like running RG & another Tank in Arena, I prey upon it myself if I see it, RG's auto-Taunt is almost always meaningless, especially with a fast Han. Running Chewie like the slow meat bag he is, Taunt can be up for 4 turns, right after STHan's first taunt.
or...
Cad Bane (L)
Lando
IG88
Dengar
STHan
I've almost got Bane 7*, so I can't testify to this one yet, but he did just get a nice boost to his basic, and his evasion bonus is best in the game. Scoundrels are actually fun and viable with Dengar & 88 imo.