Two things leap out at me in your list:
Your choice of running Black Heart, considering you're taking 3 gunboats, is interesting. Have you thought of taking one of the other Kabals? All three benefit Gunboats offensively much more than Black Heart in one way or another, and two of them benefit your Ravagers substantially too.
Scourges without special weaponry are very questionable, especially since your list is already fielding a good amount of poison from your Kabalites. I think rocking 7-8 Scourges with 4 special/heavy weapons is close to categorically better than 10 vanilla Scourges. What are you hoping to do with them?