Some very interesting character designs here. What is the new Darth Vader game of which you speak? Could you by any means pass along a link? (Alas, 'Fraid I'm not up on my SW video games...)
The lady looks almost like a cross between Aurra Sing and Arden Lyn, and I'm sure you could use Aurra parts to good effect (though perhaps some of the white-outfit Padmé figures, too. I like her face a lot (though I'm not sure what I'd use for it). She's certainly carrying Deluxe Slave Leia's polearm, that's for sure! As for the droid, I agree with you about using Grievous parts. (Finally something to do with Grievous!)
The Gand is definitely intriguing. He seems to be cybernetically enhanced or some such -- in any case, he's, ahem, "leaving less to the imagination" than most members of his species that I've seen. Wouldn't that cause some irritation in an oxygenous atmosphere? Must meditate on this further...
... the Findswoman