it's odd. use the sun on the bacground as a reference and place the light accordingly. Now the nebula probably takes its color from the neighbouring star, so I suppose this one should glow red -> light should have a slight red tint.
then, put more distance etween the erynies, I think, they're too close to each other.
what else? mmh...
decrease the opacity of the nebula a bit.
more important: give a focal point to the camera: what is the goal of this pic? is it focused on the full wing? then center the wing on the pic. on the leader? then center onthat ship, and add range blurr to the three other ships. etc etc.
The main thing for a render to be remembered, is to give it a meaning. Steak would have said it has to tell a story. I couldn't agree more.