Cannon vs. demolition.

But remember, most Captains keep Battleship at level 1 for a long time, to avoid the long cooldown. So it gets destroyed quite easily in bosses

And even if you bothered demounting and remounting to keep it alive, you miss out on spamming Battle Cannon

Did anyone ever find out how much endurance Battleship has? I was under the impression there was little difference between level 1 and 10.