More than likely, this is the last of the four Atlantis bosses that you are fighting and the Atlantis quest line happens to be the one that will finally lead to the end of the "real world storyline". The other guides are wonderful for strategy, but are missing the preparation part of things. So it's my job to make sure you are ready. Definitely Quicksave before you go inside, and make sure you have all the engravings and upgraded equipment that you need. You can always redo your skills inside if needed, though if you are reading this after the level 70 update you may have all the points you'll ever need. If you max out your Overpower Bow Strike, you get 1500% damage. Even at 8,000 damage that adds up to 120,000 for just one hit. Just make sure that you hit her. Definitely make sure your Battle Cry of Aries is activated as often as possible. I also suggest getting your Arrow Mastery up to three so that you can make Explosive arrows and complete the Artemis quests so that you have that armor set and the ability to craft Death arrows if you don't wish to close in on the soldiers. That set gives you bonuses to Hunter Damage, but the Demigod set is pretty good too if you have finished the story (and defeated all of the Cultists) by this time. You should engrave the following Legendary things: 15% Hunter Damage onto the circlet, 2% Damage as Health on the chestplate, and 50% Burning Rate on the boots. If you have completed all five of the Ostraka that combine to get a 20% to Overpower Attacks (for 48,000 more damage), put that on the other two pieces. Non-legendary engravings stack, and even if you don't have all five a lower percentage will still help some. Your weapons need engravings too. Since they are applied to your character, not your weapon, it does not matter which weapon gets what. I suggest a bow with bonuses to Hunter Damage and Fire Damage at the least, other bonuses are up to you. I like the Sword of Damocles from the end of the game, bonuses to Warrior Damage and Adrenaline are helpful. I happen to have the Trident of Poseidon in my other slot, but you can use whatever there. The three engravings I suggest are +25% to Elites and Bosses, 15% Fire Damage and Buildup and -1 Adrenaline Cost for Overpower Abilities. This last one makes it easier to keep one adrenaline bar filled for healing purposes, while letting you charge your overpower quickly. Of course Second Wind should also be level 3.