With the encouragement of the Scions, the Eorzean Alliance chooses to fight. Minfilia discusses the details of the operation.
Requirements
This quest is available if you have reached level 49 and have completed the following two quests:
Starting the Quest
Talk to Minfilia in the Waking Sands in Vesper Bay in Western Thanalan to begin the quest. There will be a cutscene.
Speak with the Allied Communications Officer
Go outside and go north from Vesper Bay to find the Allied Communications Officer. Talk to him to proceed.
Report to Adalbert
Go east into the cave and follow the path. Continue going north and you will see a broken Garlean Juggernaut leaning against the cliff. Jump onto it and walk up it to reach the upper area, or go slightly north of it and walk up the slope there. Go northwest from there to reach Adalbert. Talk to him and there will be a cutscene.
Examine the Designated Location
Go southwest up the ramp, then go northwest and through the gate into the Imperial Outpost. Make your way through the enemies, to where the orange arrow is pointing in the minimap. There will be a glow around the Destination, indicating an instanced battle. Check on it and there will be a cutscene, and then the battle will ensue.
Solo Duty: Operation Archon (Cape Westwind)
First Phase
Tartarean Earthquake is a circle attack centered on Rhitahtyn. Move away from him to avoid getting hit by it.
Gales of Tartarus is a line attack. Move out of the line to avoid it.
Magitek Missles is a series of circle attacks in a line along the area. Watch for the direction that the circles appear, and move out of the way to avoid them.
Tartarean Fore is a directional parry. You will take damage if you hit the Rhitahtyn from the direction that he is shielding. If his shield is in front of him, you must hit him from the sides or behind to avoid being damaged.
Rhitahtyn will jump to the middle of the area and cast Tartarean Tomb. This causes two flames to go toward the edge of the area, then a circle attack marker appears around each flame. Go to the edge of the area and make sure you are far away from both flames. Rhitahtyn then does this a second time, and afterward, he jumps toward you and casts Tartarean Earthquake, a circle attack centered on him, so be sure to move away from Rhitahtyn as soon as the two circle attacks from the flames disappear.
When Rhitahtyn's health is low, he repeatedly casts Tartarean Impact, dealing unavoidable damage, so be sure to do as much damage as you can, as quickly as you can, to avoid taking too much damage from this.
Afterward, Rhitahtyn will become untargetable, and three Imperial Centurions and an Imperial Pilus Prior will attack. They can reduce your health quickly, so do as much damage as you can, as quickly as you can. Use multi-target attacks to defeat the Centurions first, then when they are gone, use single-target attacks on the Pilus Prior. During this time, Rhitahtyn will also sometimes cast Drill Shot, a line attack, so be sure to dodge this as well.
Second Phase
Rhitahtyn uses Vicious Charge, stunning you temporarily.
He sometimes casts Tartarean Shockwave, an attack centered on Rhitahtyn that is much larger than Tartarean Earthquake, so be sure to quickly get out of range of this attack.
His Gales of Tartarus is also much larger, and the only safe area is behind him, so be sure to quickly go behind him to avoid it.
During this phase, when he casts Magitek Missiles, the first line of circle attacks is accompanied by a second and third line of circle attacks, so be sure to watch each line to find a safe place to move to.
During this phase, Tartarean Tomb creates four flames instead of just two. Look for the place where the flames are farthest apart, and go to the edge of the area between those two flames. After the first set of flames casts their circle attacks, Rhitahtyn will go to the center again and cast another set of four. Go to the safe spot, but be prepared to run away from Rhitahtyn as soon as this second set of flames casts their circle attacks, because Rhitahtyn will then cast Tartarean Shockwave.
After you bring Rhitahtyn's HP to 0, there will be a cutscene.
Third Phase
Rhitahtyn will bind you, and you will be immobile for the entirety of this phase. He casts Magitek Missiles, creating a flame puddle underneath both of you. You will take continuous damage from the Burns status from the flame puddle. Rhitahtyn will repeatedly cast Shrapnel Shell, a cone attack that cannot be avoided. He will become weaker throughout this phase, so just focus on dealing as much damage as possible, as quickly as possible, to survive and defeat him. Afterward, there will be a cutscene.
Report to the Allied Communications Officer
Make your way to where the orange arrow is pointing in the minimap. Talk to the Allied Communications Officer to complete the quest.
Next Main Scenario Quest
After you complete the quest, talk to the Allied Communications Officer to accept the next quest: A Hero in Need.