What you are doing here is simple, gathering up hoards of easy to aoe down hozen with a potion of luck on, when you kill a hozen in this area one will instantly respawn somewhere in the area, sometimes right beside you and other times the other side of the beach, because of this you MUST clear the pirate ship or it will reduce the amount of mobs on the beach there can get up to 6 hozen on the sails alone!