This is pretty sweet, too! That first shot is what I was talking about in your latest MOC. But maybe back off just a little do get a depth of field, focusing on the troopers, with the droids in the background or vice-versa. Different theme, but an example of what I'm talking about.
http://www.mocpages.com/image_zoom.php?mocid=274008&id=/user_images/44801/1307731702m
I didn't come up with this, obviously, others have given me similar advice along the way. Just passing it along. Great builds!