Before the league even launched, Festering Resentment was already raising eyebrows. The poison-focused dagger introduced a rare and powerful interaction: triggered spells always poison, while also granting spell block and scaling poison damage directly from spell hits. On paper, it looked tailor-made for Cast When Stunned setups-and most early theorycrafting naturally gravitated toward Gladiator thanks to its block synergies.

But one player took the idea further POE currency.

Instead of playing Gladiator directly, this version uses Champion as the base class, stealing Gladiator's lucky block via Forbidden Flesh and Flame, and layering in some of the most creative damage scaling tech we've seen this league. The result? A build that obliterates Simulacrum Wave 15 bosses in under a minute and outputs absurd poison DPS with surprisingly elegant mechanics.

Let's break down why this setup works-and why it's far smarter than it looks at first glance.

Proof of Power: Wave 15 Simulacrum in Seconds

The best way to understand this build's strength is simply watching it in action. In a Wave 15 Simulacrum run, Kosis and Omniphobia melt almost immediately. The entire wave is cleared in roughly 40 seconds, with the boss fight itself taking only a few moments once combat actually starts.

To put that into perspective, this is several times faster than most traditional Cast When Stunned or damage-over-time builds, even highly optimized ones. The poison ramp is instant, the damage ceiling is massive, and the survivability remains intact throughout.

This isn't brute-force gear carrying the run-it's mechanical synergy doing the heavy lifting.

Core Weapon Setup: Festering Resentment Meets The Black Cane

At the heart of the build is an unusual dual-wield setup.

Festering Resentment (Off-Hand)

Festering Resentment enables triggered spells to always poison, adds spell block, and scales poison damage from spells. For Cast When Stunned builds-where spells are constantly triggering off block and stun interactions-this dagger is effectively a damage multiplier baked into a weapon slot.

It ensures every triggered Blade Blast or utility spell contributes meaningful poison damage, no RNG involved.

The Black Cane (Main Hand)

This is where the build gets clever.

The Black Cane grants Phantasmal Might for each summoned Phantasm, adding flat physical damage to spells. At level 21 Summon Phantasm Support, each Phantasm provides 44–66 flat physical damage to spells.

Now layer in The Dark Monarch, which doubles your Phantasm count.

With around 22 Phantasms active, you're looking at roughly 1,200 flat physical damage added to spells-a staggering amount that then gets converted into poison scaling via Festering Resentment.

This flat damage applies to every triggered spell, massively inflating poison DPS without relying on traditional spell damage scaling.

Why Champion Is the Secret Sauce

At first glance, Gladiator seems like the obvious choice for a block-based Cast When Stunned build. But Champion brings something unique: control.

Worthy Foe

Champion's Worthy Foe ascendancy node causes enemies you hit to be taunted, taking 15% increased damage and being forced to target you instead of your minions.

This is critical.

Phantasms are notoriously fragile. Normally, they die before contributing meaningfully in high-end content. But with Worthy Foe constantly taunting enemies, bosses and rares focus on the player instead-allowing Phantasms to survive long enough to stack Phantasmal Might when it matters most.

The result is reliable uptime on the build's biggest damage source during single-target encounters.

Fortification and Tankiness

Champion also brings Fortify support and defensive scaling that Gladiator lacks. Combined with high block, armor scaling via Iron Reflexes, and layered mitigation, the build remains extremely durable even in deep Simulacrum waves.

The Ring Setup That Breaks Convention

This build completely abandons belts-and even Mageblood-for a three-ring setup that massively amplifies damage.

Valyrium

Mandatory for Cast When Stunned. Valyrium converts stun thresholds to Energy Shield interactions, ensuring consistent stuns without relying on ES-based avoidance mechanics.

Ming's Heart

With quality and catalysts, Ming's Heart provides up to 72% of physical damage as extra chaos damage. Since the build converts massive flat physical spell damage into poison, this ring alone adds an enormous damage multiplier.

The downsides-reduced life and ES-are mitigated by block, armor, and Champion defenses.The Betrayal Sting

This ring dramatically increases poison effectiveness, acting as a multiplicative boost rather than additive scaling. Combined with Ming's Heart, it pushes poison damage into absurd territory.

According to the player, this ring combination increased total damage by roughly 60%, outperforming traditional belt-based setups.It's unconventional-but devastatingly effective.

Minion Tech: Keeping Phantasms Alive

A key piece of the puzzle is Blessed Rebirth, a cluster jewel notable that makes newly summoned minions immune to damage for four seconds.

That four-second window is everything.

When Phantasms spawn during boss encounters, they are guaranteed to survive long enough to provide full Phantasmal Might stacks. Even if they die afterward, the damage window has already done its job.

This interaction alone makes the Black Cane strategy viable in high-end content.

Passive Tree Highlights and Elegant Synergies

The passive tree follows a standard Cast When Stunned skeleton, but with several standout optimizations:

Iron Reflexes to convert evasion into armor for consistent mitigation

Agnostic to remove Energy Shield and eliminate ES-based stun avoidance

Thread of Hope (Massive) paired with Elegant Hubris, allowing access to transformed nodes like Purity of Flesh without inefficient pathing

Forbidden Flesh and Flame to steal Gladiator's lucky block node

Rational Doctrine for balanced attribute scaling and conditional bonuses

Bloodnotch + Immutable Force for stun recovery synergy

Tattoo usage focuses on block chance, armor, crit damage reduction, and resist capping-allowing the build to skip many traditional defensive nodes entirely.

A Small Optimization Opportunity

One interesting note: the build currently uses Light of Meaning (Physical Damage). Given that the main damage source is poison-which scales primarily from chaos and damage over time-this may be suboptimal.

Swapping Light of Meaning to Chaos Damage could potentially increase total DPS even further. Based on the gem setup (Void Manipulation, Unbound Ailments, Awakened Deadly Ailments), hit damage is largely irrelevant compared to poison scaling.

In other words: the build may not even be fully optimized yet-and it's already deleting bosses.

Final Thoughts: A Masterclass in Build Design

This Champion Cast When Stunned Poison build is a perfect example of why Path of Exile remains unmatched in build creativity.

By combining: buy POE currency

Festering Resentment's poison-trigger mechanics
Black Cane's Phantasm-based flat damage scaling
Champion's taunt and defensive utility
A three-ring setup that abandons belts entirely

…the build achieves absurd damage without sacrificing survivability.

It's clever, efficient, and deeply satisfying to watch in action. Most importantly, it proves that sometimes the strongest builds aren't the obvious ones-they're the ones that understand how mechanics actually interact under the hood.