C3PO Sith synergy?

Mephisto_style

Can he boost them

UdalCuain

Not really. He can grant them stacks of Translation with his special, but the gain is negligible when compared to a fifth Sith instead.

Jarvind

He can boost any team by giving them Translation and calling them to assist, but Sith won't get the benefit of any of his uniques which seems like kind of a waste.