It looks like you are quite fond of shooting rather than CC, so i won't get into your lack of CC capability, I am sure that you are aware of it.
Blasters are fine, but you have very limited long-range AT, while you have more than enough Splinter Cannons for AI. The Scourges give you a bit more range, but they won't last very long.
Some Raiders with Dissies instead of 2-3 Venoms would change things up a bit, give you some heavier, long-range punch. They'd also give you a few extra hull points for greater longevity (at least as much as DE can get).
And as good as you may be with them, 3 VR's is quite expensive and limits you to the whims of flyers. Swapping one for a Ravager would give you one, more readily available heavy option, and free up a few points.
Just some thoughts. Cheers.