Ruins of Amdapor Diablos Guide

Quick guide for those reaching the final boss of this dungeon.

Before you pull, assign multiple "Signs" to each party member. For example, our tank used "Target to Attack" 1 and 2. Melee DPS used the Square and Circle signs. Ranged used "Target to Ignore" 1 and 2. Healer used "Target to Bind" 1 and 2.

Assign a color to each player. Red, Blue, Green, Yellow.

As you pull him, he will spawn doors around the arena. Each member is to match the two same-colored doors to each other at the very start. After this is done, the doors will close and hide their color away. DPS him as usual.

He will target 1 member of the party periodically and set a pulsing AOE node on top of them. Place these in the center of the arena.

He has a periodic AOE which will have safe spots both directly next to him as well as a fairly long distance away. Ranged DPS and healers need to be aware and stand roughly half of the arena's distance away to avoid taking damage.

He will periodically sleep the party, non-threatening but annoying.

At certain HP breakpoints, he will charge a very long skill which will hit your party VERY hard. To avoid all damage from this, open two matching doors while he charges it. The doors will remove your party from the fight temporarily, long enough to avoid damage, and place you back in.

Be sure you know who's opening doors in what order, and you should be golden.

Peace. Been fun figuring this out.

Credit goes to myself, Kallistra Noblus, Junko Akiyumi, and Avant Zero on Gilgamesh for the info.

Bit difficult to grasp since i havent seen a single inch of the Dungeon, but I will keep this in mind. Thanks!

Or if you're geared enough, ignore mechanics, and burn him.
Group up behind him, run away if you're targeted, virus omen, groups heals. We burned within 2 omens and we forgot LB

This sounds like a fun fight, can't wait to learn it. Was very excited to see Diabolos come out. I'm sure you can burn it being at the right gear set but always good to know the fight for times you can't just go into mindless zombie attack mode.

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Originally Posted by PriyaJugulataris

Or if you're geared enough, ignore mechanics, and burn him.
Group up behind him, run away if you're targeted, virus omen, groups heals. We burned within 2 omens and we forgot LB

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That's the same for any dungeon. It's still helpful to know the mechanics in case you need to carry people who aren't fully geared yet. Plus, it's fun figuring them out. *shrug*

Also, you can and should stun Nightmares

If u have high hp 5k + an use stoneskin u can negate nightmare ( falling asleep )
Also just designate the healer on door duty.
-open 1 door preemptively so that later when he charges u can easily open the 2nd door and have lots of time doing it.
-once u the void appears the symbols on the doors will light up again, this will give u a chance to look and match any doors u missed/ forgot.
Doing this tactic will allow for maximum dps time as both dps and tank will be constantly attacking diabolos. So u should be able to kill him after the 2nd big aoe.

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Originally Posted by Yumi_umi

If u have high hp 5k + an use stoneskin u can negate nightmare ( falling asleep )

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And if you have less you can Stoneskin + Tank LB1/2. Did it our first attempt when the healer forgot the color combo for the last doors before Diabolos died. :P

Warning to everybody, the fight is glitched. Just ran this, we entered a door, and somehow we got stuck. It wouldn't let anybody out until somebody logged out, practically breaking the fight, making it impossible to win since you can't kill him and you can't die. I'm giving you all a heads up so you know this exists.

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Originally Posted by RyuDragnier

Warning to everybody, the fight is glitched. Just ran this, we entered a door, and somehow we got stuck. It wouldn't let anybody out until somebody logged out, practically breaking the fight, making it impossible to win since you can't kill him and you can't die. I'm giving you all a heads up so you know this exists.

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Have ran it 6 times without a hitch you just might be unlucky.

The way we(fc) do it is just have the DD mark the doors. One on the left other right. We mark like so;

Red = ignore signs
Blue = shapes
Yellow = numbers
Green = purple links

Then we call out a sign to open and go from there. Open the doors at half way mark of the ruinous cast.

You don't have to open both doors when he is casting; you can open the first whenever you want then just open the second when he is around 50%. Makes it a lot easier and you can continue to burn him down while he channels. If signing works for you, that is good, but that is kind of way over complicated to explain to people new to the fight. Everyone just take a color and a turn. That way each person only has to remember two doors - and only one person has to worry about opening letting the others continue dps. Much simpler imo.