Deus Research Base

Before you go

Atiel’s door opens once the clear gauge fills (about 110 on Stage 1, 150 on Stage 4). Trash counts.
Gelcos and Nazmun are optional, but each fills about 45 of it and adds loot.
Fast groups send one runner ahead to light the Kibelisk teleporters while four clear.

Each stage keeps the last one’s extras and adds one. A Stage 3+ tag in this guide means stage 3 and up.

Stage 1Item level 1,600 No extras. Learn the fights here, then go get your S.
Stage 2Item level 1,900 Balance. Dead elites leave a zone that buffs monsters and burns you. Move off the corpse before the next pull.
Stage 3Item level 2,200 Wrath. Regular mobs hit harder under half HP. Kill one at a time and burst them through it. No mega pulls.
Stage 4Item level 2,500 Judgment. Boss hits stack it until you explode on everyone near you. Dodge what you can, and step away before it pops.

He marks someone far away and charges. Marked player, drag it along the outer wall so the electric trail stays out of the middle.
A vortex yanks everyone in, then his whip hits all around him. Walk out or pop a defensive.
His slam splits the floor into lines. Stand in a gap, then dodge the second slam.
Around 50% and 25% the floor lightning spreads. Get out of it, then go back to hitting him.

Rotating lasers sweep the room. Jump them, and save your dodge for when they switch direction.
Beams come back to back. The first one isn’t the last one.
White ring on you? It blows up in about 3 seconds. Spread out, then regroup.
Bombs pile up around him. Melee, step out early.

He waits until someone walks into range, so buff up first. Most of this fight is where you stand and who you’re tied to.

Two of you take damage until you get some distance. Walk apart, calmly.

A heavy strike is coming for them. Everyone stack in the circle to share it. Alone, it’s a one-shot.

Stay close to him. Wander off and the chain hurts.

Twice a fight he goes to the middle and the outer floor falls away. His push and blue orbs shove you out, so head in early. Falls can’t be revived.
He grabs someone and smashes them into the floor. It can one-shot, so healers keep everyone topped up.
Stand too far away and he throws cross-shaped blasts at you. Everyone but the tank stays fairly close.
Stage 4 Every hit he lands adds Judgment. Dodge what you can, and step out of the group before yours goes off.

Around 30% Atiel heads to the middle and starts his wipe cast. You get one try to stagger him before it lands.

Atiel Slice zone Slices sweep Push Your party Floor already gone

From about 40% down, save your stagger and CC skills for this.
He goes to the middle and starts the cast. Slice zones cover the floor and a steady push shoves everyone outward.
About 10 seconds. Throw every stagger and CC skill at him. Damage can wait.
Walk against the push and step around the slices as they move. Pushed off the edge means no revive.
Bar breaks, cast stops. Now dump everything and finish him.

Ten seconds to break his stagger bar.

Miss it and everyone dies, even with him at 1%.