[Plunderin Mom]

I think fury is worth maxing. If you're sinking one ship and another gets too close, or one drops on you, maxed fury is great for sinking them before they sink you. And, I'm with Raven on this one... maxed lightening does enough damage per hit that you don't need skill points on the rapid reload. You can either use it to take out the sails of the ship first, and then plug away on it with something that does less damage for max points, or aim at the hull and sink it quickly enough.

I also max out the regular cannonballs and firebrand is good to put extra points on.

And for 25 percent more damage from all of the cannon ammo, I max (each point gives you 5 percent more damage) the passive cannon skill that increases cannon and grenade(?) damage.