Any amount of Banshees.
As long as you're not going against the Anglean and Baron bosses, Banshees are Boss ship Bane. If you can keep the rockets on their balloon, they grind against the dirt in only a few clips.
Barons and Angleans are a different story, and in that regard, Gat/Flak is usually pretty good. Hwacha with greased can be pretty useful as well, just for trying to absolutely increase the amount of fire going downrange.