Path of Exile 2 Delirium League Guide

Intro

Welcome to the ultimate Path of Exile 2 Delirium League Guide, your one-stop resource for mastering the intricate mechanics of Delirium and optimizing your rewards. Whether you’re here to conquer waves of mist-cloaked monsters, unlock the secrets of Simulacrums, or secure exclusive rewards like Heroic Tragedy and Olroth’s Resolve, this guide has you covered.

In this guide, you’ll learn how to effectively navigate the Delirium fog, maximize your Simulacrum Splinters, and tackle formidable bosses such as Kosis and Omniphobia. Along the way, you’ll also discover optimal strategies for farming rare Distilled Emotions, managing Atlas Passive Nodes, and leveraging the most efficient crafting routes.

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1. How It Works

During your journey through the Atlas in Path of Exile 2, you’ll occasionally encounter maps featuring the Delirium mechanic. To trigger the encounter, simply step through the shimmering Delirium Mirror located at the map’s entrance. This mirror unleashes a spreading grey mist, gradually enveloping the area and intensifying as it advances.

The expanding fog not only spawns waves of deadly Delirium monsters but also grants monsters defensive buffs based on their proximity to the Mirror. To increase monster density and loot potential, activate Fractured Mirrors scattered throughout the Delirium zone. However, maintaining pace with the advancing mist is crucial; falling behind by more than four seconds will terminate the encounter.

💡 Be mindful of the unique bosses, Kosis and Omniphobia, who may spawn during your run. Kosis becomes particularly dangerous near Wave 15, while Omniphobia offers an alternate challenge.

2. Rewards

Defeating Delirium-affected monsters fills your reward bar, displayed conveniently above your flasks. Monsters unique to Delirium fill the bar at an accelerated rate and may drop Simulacrum Splinters (available at Tier 11+ Waystones). Each splinter corresponds to how many Distilled Emotions will drop when the encounter concludes.

Exclusive rewards from Delirium encounters include a variety of powerful Distilled Emotions, such as:

• Distilled Despair
• Distilled Disgust
• Distilled Envy
• Distilled Fear
• Distilled Greed
• Distilled Guilt
• Distilled Ire
• Distilled Isolation
• Distilled Paranoia
• Distilled Suffering

Simulacrum Splinters can drop from Waystone tiers 11 and higher, and combining 300 of them forms a complete Simulacrum, granting access to the pinnacle boss fight.

3. How to Run

Maps can naturally feature a Delirium Mirror, denoted by a unique icon. For guaranteed Delirium encounters, players can use a Delirium Precursor Tablet on a Watchtower. This forces the encounter to appear in all uncompleted maps within the tower’s radius, with the number of Delirium layers determined by the implicit modifier of the tablet. Any explicit modifiers apply globally across affected maps.

Alternatively, players can Instill Delirium directly into Waystones using the Instilling UI, activated by right-clicking Distilled Emotions. This allows for precise control over modifiers, though it doesn’t stack with natural Delirium Mirrors.

⚠️ Be strategic: Instilled Waystones and Delirium Mirrors are mutually exclusive, so plan your routes accordingly.

4. Pinnacle Encounter: The Simulacrum

The ultimate challenge of Delirium League in Path of Exile 2 is the Simulacrum encounter, unlocked by combining 300 Simulacrum Splinters. Once formed, the Simulacrum is placed into the Realmgate at your Atlas center, near your starting location, to access this high-stakes arena.

This encounter consists of 15 waves, with each wave increasing in difficulty and introducing random negative modifiers akin to map mods (e.g., “Monsters Penetrate 25% of Elemental Resistances”). Completing each wave fills your Delirium reward bar, rewarding players with valuable loot and 2 Delirium Atlas Passive Points upon clearing all 15 waves.

💡 Be prepared: while the challenge starts manageable, the final waves, especially Wave 15, are brutal. Kosis, the most formidable boss, often spawns here, offering exclusive loot. Omniphobia may also spawn but lacks unique drops.

5. Kosis’ Abilities

Kosis is the centerpiece of the Simulacrum, and his lethal mechanics require attention and skill to survive:

• Lethal Beam: Kosis channels a powerful beam that sweeps across the arena, dealing devastating elemental damage. Watch for the beam’s path and reposition quickly to avoid it.
• Summon Minions: Kosis calls forth waves of spectral minions, creating chaos and splitting focus. Prioritize these adds to reduce incoming damage and regain control of the fight.
• Slams and Sweeps: Kosis executes heavy melee slams with area-of-effect damage. These moves are telegraphed with glowing indicators; react promptly with movement or dodge skills.
• Zone Control: As the fight progresses, Kosis creates hazardous zones on the ground, dealing lingering damage and forcing constant repositioning. Adapt quickly or risk heavy damage.

6. Atlas Passives

The Delirium League in Path of Exile 2 offers a variety of powerful Atlas Passive nodes that can significantly enhance your Simulacrum runs, boosting both monster density and reward quality.

7. Recommended Atlas Nodes

Priority Node	Reason
Get out of my head!	Essential for progressing through the tree and increasing Instilled Waystone effects.
Would you like to see my face?	Doubles splinter drops, making Simulacrums more accessible and profitable.
The mirrors… the mirrors!	Expands pack size for faster reward bar fills and greater currency generation.
Isn’t it tempting?	Increases loot but adds challenge; best for strong builds aiming for high-value rewards.

8. Distilled Emotions

Distilled Emotions

Right-click any Distilled Emotion to access the Instilling UI, where you can infuse your Waystones with unique bonuses or add powerful Passive Notables to your Amulet, depending on the combination used.

• Distilled Ire
• Distilled Guilt
• Distilled Greed
• Distilled Paranoia
• Distilled Envy
• Distilled Disgust
• Distilled Despair
• Distilled Fear
• Distilled Isolation
• Distilled Suffering

💡 Pro tip: Three Distilled Emotions of the same type can be used at the Reforging Bench to upgrade them to a higher tier.

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Simulacrum Splinters

Collecting Simulacrum Splinters is the foundation of your access to the Simulacrum encounter. Splinters drop from Delirium-affected monsters, with quantity increasing based on Waystone tiers and Atlas Passives.

300 Splinters combine to create a Simulacrum, unlocking the pinnacle boss encounter. Efficient farming with optimized routes is essential for consistent Simulacrum access.

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Simulacrum Exclusive Uniques

Clearing high waves of the Simulacrum grants access to unique rewards not obtainable anywhere else:

• Assailum
• Perfidy
• Melting Maelstrom
• Collapsing Horizon

💡 These powerful items are highly sought after for their unique mechanics and build-defining properties.

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High Difficulty Drops

Completing the highest difficulty waves in Simulacrums increases the chances of obtaining rare items like:

• Megalomaniac
• Strugglescream

These drops are highly valuable for players aiming to craft perfect builds and maximize their profit from Delirium.

9. Final: Master Delirium League in Path of Exile 2

The Delirium League in Path of Exile 2 is a thrilling challenge for those seeking complex mechanics and exceptional rewards. From navigating the expanding Delirium fog, managing Distilled Emotions, collecting Simulacrum Splinters, and tackling the pinnacle Simulacrum bosses, this guide equips you to face every obstacle.

With detailed strategies covering Atlas Passive nodes, rare Simulacrum-exclusive Uniques like Assailum and Perfidy, and high-difficulty drops such as Megalomaniac and Strugglescream, you’re ready to elevate your gameplay and profit potential.

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Prepare your flasks, sharpen your skills, and embrace the challenge of Delirium League—your path to mastery starts now.