Now that I look at it again, Krahta is actually just OP. You can just park friendly ships next to it until you get the inevitable Nemo’s Plans + X UT (Runes of Thor for unlimited AA’s/etc), not to mention various other combos like Neptune’s Trident. It’s actually just broken. I was trying to look at it from a gimmick/enemy perspective with the herding idea but it’s too exploitable.
Severed Limb seems like a good candidate for a simple Cursed hybrid. They’ve got plenty of larger ships that can be better gunships. Windcatcher/S+S speed/5 cargo is great for the Cursed gold fleet, so I don’t think I’d bother outfitting her purely for war.