|You will begin the fight against some Morningstar Gunners (PGL), Morningstar Boatswains (LNC), a Morningstar Falmadair (GLD), and Barber Hirskskrat (CNJ), and will be assisted by Foreseer K'lyhia. The magic circle she summons offers Vulnerability Down, essentially raising your resistances to damage across the board, so staying within the circle is a good idea. Do make sure to dodge AoE attacks however.
Summon your Topaz Carbuncle to try and keep the pirates off of you first. Hirskskrat should be your first priority to keep him from healing his comrades. Make sure to take full advantage of your DoTs and Energy Drain, and once you've taken care of Hirsksrat you should apply your DoTs to one pirate, then move on to the next. Ruin is, sadly, almost a waste of time. Eventually you'll face a second wave, which includes a Morningstar Cosier (THM). The Cosier should take priority due to his high damage output. Once he's down, it's business as usual.
The second phase of the fight will be against Doesmaga Poisonheart (MRD) and a few more pirates. Sic the topaz carbuncle on Doesmaga and deal with the pirates. Once they're taken care of, turn your attention to the captain.