I myself prefer using swift for my attachments, because the reload is only 1 second. So I can just keep firing like it’s semi auto. I can shred most sea creatures before they even aggro.
They also fire fast enough that I don’t need to lead my shots. I just keep shooting in the same spot while a white eyes or obolus goes back and forth, never escaping the stunlock.
swift is definitely king for the ship attachments. Whenever I’m on someone else’s boat and I man their swivel guns, it’s always crazy slow. Can’t live without it