I beat T6 with G9 Bossk (L), G10 Boba, G10 IG, G9 Greedo, and G9 Dengar. It took some mod swapping, but it wasn't too hard. Dengar was important though to keep R2 from stealthing everyone so I could target Chewie first, so I don't know how well it'd work without him.
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7* ?? with this ?
Nope. 6*, just as he asked for in the original post.
Bossk only 6*, so can't even try 7*