Diablo 4 Season 15 Warlock Build: Demonform Leap Spam Speed Farming Guide

Summary

The Warlock has emerged as one of the most dominant speed farming classes in Diablo 4 Season 15, with the Demonform Leap Spam build rivaling—and in some cases surpassing—the mobility of Whirlwind Barbarians. This guide covers a high-speed, Torment 12-viable build that leverages the Anathema of the Primes unique sword to transform Archfiend Demonform skills into Core skills that cost Wrath instead of Dominance, making it incredibly efficient whether you're farming your own gear or looking for cheap Diablo IV Items to accelerate your setup. The build can perma-leap across maps while dealing trillions of damage, making it one of the fastest XP farmers in the current meta. It can comfortably clear up to Pit Tier 120 and excels at maggot farming for rapid experience gains.

Core Build Concept

Why Anathema of the Primes?

Anathema of the Primes is the build-defining Unique 2H Sword. Its effect makes every Archfiend Demonform skill variant a Core skill that costs Wrath rather than Dominance . This means you can stay in Demonform permanently while spamming mobility skills like Rampage without resource constraints.

Key effect: Hitting enemies with a Core Skill increases the damage they take from you by 15-20% per skill, up to 45-60% total .

How to Obtain Anathema of the Primes

Anathema of the Primes drops from Andariel at Hanged Man's Hall. You'll need a Greater Lair Key, which can be obtained from lesser Lair Bosses like Lord Zir and Grigoire .

Alternative methods:

Horadric Cube: Upgrade a Common 2H Sword into a guaranteed Unique of that type

Boss Trophy conversion: Collect 5 Boss Trophy drops from Andariel

Purveyor of Curiosity: Gambling can yield the sword directly 

Gear Setup

Core Uniques

Charm Setup

The build runs two separate Charm sets to maximize Demonform and Hellfire damage :

The Eightfold Idol: Key DPS charm

Flesh of Abbadon Set: Provides massive buffs in and out of Metamorphosis 

Seal priority: Look for a Seal with +1 Charm Slots x2 .

Skill Setup

Active Skills

Skill Tree Priorities

Rampage → Demonic Smash: Your main leap ability; Hellfire variant summons a greater demon 

Metamorphosis → Destruction Demon: Stay in Demonform with all Hellfire abilities available 

Dark Prison: Now treated as a sigil skill—press as you move 

Resource Management

The Anathema + Buck Jar Combo

The build uses Tyrael's Will combined with Buck Jar to trigger Unstoppable, which generates resources for perma-leap. With Anathema of the Primes, all Demonform skills cost Wrath instead of Dominance .

Why this works: The build only spends Wrath (not Dominance), allowing unlimited Demonform skill spam. Unstoppable triggers from Tyrael's Will and Buck Jar fuel this loop .

Wrath Generation

Unbound paragon node for Wrath generation 

Rampage itself generates Wrath while leaping

Evade procs Tybalt's Will for additional resource recovery

Paragon Board

Priority Nodes

Glyph recommendation: Superiority offers bonus magic nodes, 10% damage reduction, and increased dominance generation—excellent for smoother resource flow .

Defensive Layers

Fire Resistance Conversion

The key survival mechanic: Convert all incoming direct damage into fire damage using Volatility + Cauterization aspects .

With high fire resistance (the build can reach 24,000+ fire res), incoming damage is reduced by over 86%. This also negates the burning DoT from Metamorphosis, which normally burns you for 10% of your life as fire damage .

Undying Aspect (on Amulet): Heals for 4% of life whenever a skill is cast .

Defensive Aspects

Diabolical Armor: Direct damage reduction while in Demonform 

Scorching / Misfortune: Additional resistance support

Aspect of Might: General damage reduction 

Gameplay Loop

The Rotation

Enter map: Activate Metamorphosis to enter Demonform

Leap spam: Hold down Rampage (Demonic Smash) for perma-leap mobility

Evade regularly: Procs Tybalt's Will for resources

Cast Dark Prison: Press as you move—aura follows you

Elite/Boss: Use Blazing Scream for instant elimination

Metamorphosis management: Toggle off when resources drain; reactivate when ready

Playstyle Tips

One-button build: Leaping alone clears most content 

Sigil of Chaos: Maintain permanent uptime for Fathomless 105% damage bonus 

Demonic Glare (endgame variant): Replace Blazing Scream with Demonic Glare Profane Sentinel for laser damage in Demonform 

Strengths & Weaknesses

Strengths

Insane mobility: Faster than Whirlwind Barbarian 

Trillions of damage: Even without Blazing Scream active

Massive AoE: Clears screens instantly

Torment 12 viable: Comfortable speed farming

Pit 120 capable: Endgame push potential

One-button playstyle: Minimal button complexity

Weaknesses

Resource hungry: Relies on Anathema of the Primes to function properly

May face nerfs: DPS is considered "overkill" and likely to be adjusted 

Requires specific uniques: Not a "starter" friendly build

Important Notes

What Doesn't Work

Support gems of the same aura type don't stack—equipping two similar effects only provides one instance 

Season 15 PTR Context

The Blazing Scream Warlock reached Pit Tier 150 on the PTR—the highest of any class . This build is a speed variant of that powerhouse. The build's DPS is so overkill that even without Blazing Scream, leaping alone deals enough damage for most content.

Potential Patch Changes

Blizzard has buffed multiple Warlock skills in Season 15:

Dark Prison's Calamity variant: 30% → 200% damage; now treated as a sigil skill 

Infernal Breath: Stronger base scaling and larger bonuses 

Multiple defensive aspects improved (Diabolical Armor, Cauterization) 

The build is fully expected to receive nerfs, but its base power is so high that even significant reductions won't kill its viability.

Conclusion

The Demonform Leap Spam Warlock is one of the strongest speed farming builds in Diablo 4 Season 15. By combining Anathema of the Primes with permanent Demonform, massive fire resistance conversion, and perma-leap mobility, you can clear Torment 12 content at speeds that rival—and often beat—the best Barbarian and Sorcerer builds .

The build shines for:

XP farming: Maggot farming at breakneck speeds

Speed clearing: Maps, Infernal Hordes, and Pit Tier 120+

Fun factor: The most visually impressive and fluid Warlock playstyle to date

While nerfs are likely coming, the build's current power level is so overkill that it should remain effective even after adjustments. Get your Anathema of the Primes from Andariel and start leaping—and if you're looking to skip the farming grind or supplement your gear, you can easily buy Diablo 4 Items from trusted sources like MMOEXP to get your build online faster. Happy leaping!