This quest is ludicrously easy. It can be performed at the lowest possible level. Three waves of Naga appear from behind the hill. One wave of three, one wave of two, and a final wave of three. They are all level 40.

Pay attention to the Captain, though, swabbie! He tells you to man the cannon. Head up the ramp to the ship and find the solitary cannon on the main deck. Right-clicking on this cannon while standing beside it will one-shot every Naga that appears in one fell swoop. Wait until the Naga are descending upon the defenders and fire. Every Naga will die instantly. After your three waves are done, collect your reward, matey!

This is actually pretty easy once you get a handle of what exactly you need to do.

Basically, there's one cannon on top of the ship that you need to fire (I think it's the only one you are able to interact with).&nbsp Go on the ship and watch in the direction that the cannon aims.&nbsp About 4 waves of naga come up the path and if you fire the cannon when they appear in sight, the cannon kills them outright.&nbsp If you do this correctly, the Captain and his crew won't have to fight anything at all.

I just finished this quest.&nbsp I talked to Shakes O'Breen and he gave me the quest that started off with "this is bad." ..."The Naga will be coming from the sea.&nbsp I need you to remain up here with me to fend off the attack.&nbsp Man the cannon and drive them back. Are you ready"
As soon as I accepted the quest I ran up the gang-plank to the ship and ran to the cannon on the main deck (its the one to the right and slightly aft when you get on the ship facing to the rear) and manned the cannon that faces toward a slight saddle back on the hillside.&nbsp Once there you will be able to click on the cannon.&nbsp The ogre (Lolo the Lookout} that is standing on shore ran up the hill to the saddle-back where the cannon is facing and he waited there for a short time, then he ran back to his normal place.&nbsp Also several hands (sailors) repositioned to where the ogre normally stands. very shortly thereafter a Naga appeared at the saddle-back and I fired the cannon. The naga droped dead.&nbsp Following the first, more Naga appeared and each time I fired the cannon (from the deck of the ship)and they again dropped dead.&nbsp I continued to fire each time a (or group of) Naga appeared and they immediately droped dead.&nbsp I continued this until I got the message that the quest was completed.&nbsp I did not have to fight hand to hand any Naga.&nbsp I only used the cannon.&nbsp Got my ring (2 Str, 2 Agi, 10 Sta) and was finished.&nbsp Hope this helps to better explain how this quest is easily accomplished.