Introduction to Eureka Orthos in FFXIV

Eureka Orthos is the third Deep Dungeon players will encounter, with 100 floors and a level cap of 90. All players will begin at level 81 when starting on Floor 1, and level 90 when starting on Floor 21. You must complete the quest Delve into Myth in order to enter the duty, as well as have completed the first 50 floors of Palace of the Dead.

Clearing a floorset inside Eureka Orthos rewards players with gil, experience, and Allagan Tomestones of Poetics at all levels. Players at the current level cap are also awarded both the capped and uncapped tomestones currently available.

Upon reaching floor 100, a terminal can be found. Interacting with this will give all players an Orthos Tomestone, which can be exchanged for accessories or housing items at the Synthesis Node in Mor Dhona.

Various Titles are available from clearing Eureka Orthos.

• Duskfall: Clear floor 30 of Eureka Orthos.
• True Steel: Clear floor 100 of Eureka Orthos.
• Sovereign Hero: While wearing the four Enaretos Accessories, speak with Koh Rabntah. This also awards the Aeturna Horn.
• Once and Future Queen or Once and Future King: Clear floor 100 of Eureka Orthos solo, having started from floor 1 and not recorded a single KO.

• Q: What food should I use?
  • A: Use the highest item level food available, as it gives the most Vitality. As of patch 6.58, this food is HQ i640 Baked Eggplant or equivalent.
• Q: What healing potions should I use?
  • A: Using a Hyper-potion is recommended as it will restore the most amount of HP.
• Q: Should I use damage potions?
  • A: Damage-increasing Tinctures can be used for a dps boost as necessary. The cheapest HQ Tinctures you can currently buy will be the ones for the current raid tier most of the time, as they have the highest supply. As of patch 6.58, these are Grade 8 Tinctures.
• Q: Is there anything else I need to know about consumables?
  • A: Orthos Potions have their own 15s recast timer. However, all other potions mentioned above share the same recast timer. As damage Tinctures have a 4m30s recast, this means you will be unable to use a healing potion until that timer is done, so be aware of this if you plan to use one.

Orthos Potions are an item that can only be used inside Eureka Orthos. They give the user a health regeneration effect for 30 seconds, and have a 15 second cooldown, allowing them to be permenantly in effect if necessary. These potions are extremely helpful in party runs, but are required for survival in solo runs, especially on jobs with few or no other ways of healing.

20 Orthos Potions can be bought with 1 Orthos Aetherpool Fragment from the Synthesis Node in Mor Dhona. Fragments can rarely be found inside Bronze Coffers in Eureka Orthos. You also get a guaranteed one after the floor 30 boss.

In order to farm Fragments efficiently, you should enter the dungeon on floor 21 with either a matched party, or a fixed party of four players. From here, defeat the floor 30 boss as quickly as possible in order to obtain the guaranteed drop, though be sure to open any Bronze Coffers you find along the way. Upon clearing the floorset, delete the save file and re-enter, repeating as needed.

If you wish to attempt a solo clear of Eureka Orthos in order to obtain the All by Eurekaself II achievement and the Once and Future Queen/King title, you should ideally have at least 200 Orthos Potions before beginning. While you may find yourself needing more potions than this across the entire run, you will be picking up more Potsherds along the way that can be exchanged for pots between floorsets.

Players will be restricted to the use of an Orthos Aetherpool Arm and Orthos Aetherpool Armour while inside Eureka Orthos. In addition to gaining levels, players must enhance these items as they progress through the dungeon by opening Silver Coffers, up to the cap of +99 for each item.

In order to farm Aetherpool efficiently, you should enter the dungeon on floor 21 with either a matched party, or a fixed party of four players, and open as many Silver Coffers as possible. Upon clearing the floorset, delete the save file and re-enter, repeating as needed.

You can exchange 10 aetherpool from both your Arm and Armour for an Orthos Aetherpool Grip at the Synthesis Node. You can then exchange three Grips (total 30/30 Aetherpool) for an i620 Orthos Weapon, allowing you to glamour the appearance of low level Orthos Atherpool Arms to regular weapons outside of Eureka Orthos. By later trading in your Orthos weapon, plus an additional six Grips (total 90/90 Atherpool), you can obtain an i625 Enaretos weapon, allowing you to glamour the appearance of high level Orthos Atherpool Arms to regular weapons outside of Eureka Orthos. Unlike other Deep Dungeon weapons, these can be dyed to change the colour of their internal lighting effect.

Throughout the Deep Dungeon, there is a small chance that unique enemies will spawn. These mobs have a significant amount of HP, incredibly powerful attacks, and are immune to knockback, which prevents them from being killed with a Pomnader of Dread. However, successfully slaying one will grant all party members a 30 minute buff and a piece of the Accursed Horde.

Dread Beast	Abilities	Buff Effect
Lamia Queen	Grants a stacking Regeneration effect to itself once pulled. It has a telegraphed point-blank AoE with a short cast time, and an omnidirectional gaze mechanic with a long cast time.	Grants a Regeneration effect to all party members for 30 minutes when defeated.
Meracydian Clone	Casts Berserk to grant itself Damage Up, which can be interrupted. Below 40% HP, it casts a massive telegraphed AoE with a long cast time.	Grants a 30% Damage Up effect to all party members for 30 minutes when defeated.
Demi-Cochma	Grants a stacking Vulnerability Down effect to itself once pulled. At low HP, it casts a massive sacrificial AoE with a long cast time.	Grants a 30% Vulnerability Down effect to all party members for 30 minutes when defeated.

While clearing Eureka Orthos with a full party of four players is usually faster, safer and easier than entering alone, clearing the dungeon by yourself from beginning to end is not only possible, but rewards players with a rare title, Once and Future King/Queen, upon clearing floor 100 with no deaths on a run that started from floor 1.

Clearing Eureka Orthos solo relies entirely on a player's individual skill, and can therefore be a welcome change of pace for those who are used to the standard eight player content of Savage and Ultimate raids. However, it is easy for some players to become frustrated or burnt out when attempting to clear, and being able to take a break for as long as needed before returning to the same save file and picking up where you left of is important to keep in mind if you find yourself struggling.

As of 6.58, every job has cleared Eureka Orthos solo. However, some jobs are easier or harder to achieve this feat with. For example, Tanks and Healers will find it harder to stay on pace when progressing through later floorsets, as their damage output is lower than that of DPS jobs which will result in more time taken per floor.

Unlike previous Deep Dungeons, the majority of the enemies within Eureka Orthos often deal minimal amounts of unavoidable damage to players. Instead, the challenge is found in the mechanics of the enemies and bosses, the latter of which are much more involved than the bosses of previous Deep Dungeons. As such, survivability matters far less when choosing a job.

The jobs listed below are the main standouts at both ends of the difficulty scale for soloing Eureka Orthos.

• Samurai
  • Samurai excels at consistent high damage, able to dash from enemy to enemy in floors and utilise its powerful offensive kit to quickly progress the dungeon. With Second Wind and Bloodbath at its disposal alongside their fast killtimes, it can end up requiring fewer healing potions than other jobs to clear.

• Machinist
  • Machinist excels at kiting and burst damage, as well as highly useful crowd control in the form of Head Graze, Leg Graze and Foot Graze. Peloton is also an extremely valuable skill for navigation through the floors, as the extra movement speed allows you to traverse floors faster. It also has an extra mitigation tool compared to the other physical ranged dps in Dismantle, making it even safer.

• Summoner
  • Summoner, like Machinist, excels in kiting and burst damage. Unlike Machinist and most other jobs, it has no gauge it needs to build or resources it needs to manage beyond Fester charges, and can simply chain pull enemies rather than wait for cooldowns to come back before initiating. It also has a strong survivabiltiy tool with Radiant Aegis.

• Red Mage
  • Red Mage is a very balanced job to take into Eureka Orthos, with good burst and access to healing in the form of Vercure as well as the ability to Sleep mobs in an emergency.

• Astrologian
  • Astrologian has the lowest personal dps of all jobs in the game, due to being designed around gaining a significant amount of its power from feeding teammates raid buffs such as its cards and Divination in eight-player raids. As such, it is the hardest job to clear Eureka Orthos with, and needs to make full use of both pomanders and strategies like intentionally stepping on Landmines in order to clear floors fast enough to have a chance of completing each floorset.