The Crimson Gloom

Bloodletting returns more energy at higher Efficiency (about 364 energy per 50% health at 100%, versus 228 at 45%), so neutral Efficiency means fewer, less-vulnerable casts.

Gloom slows and heals; Corrosive Projection is in the aura and Blending Talons gives a quick radial stun and full shield regen off two Augur mods.

Dread Mirror grants knockdown immunity and full frontal attenuation.

1.

Cast Bloodletting (3) twice to near-max energy.

Recast when energy drops below about 300.

2.

Activate Gloom (2).

Deal damage to heal, repeat Bloodletting as needed.

3.

On shield break, tap Seeking Talons (4) for full shield regen and a Gloom-extended radial stun.

4.

Keep Dread Mirror (tap 1) up at all times.

Hold 1 to charge and release a nuke.

Positive Duration for Dread Mirror, Gloom drain and the Talons mark.

Neutral Efficiency for the Bloodletting return.

Moderate Range for Gloom, Dread Heart and Blending Talons, no higher or you slow enemies too far out.

Strength only for the Gloom slow; the listed 199% base gives about 70% slow, and a Nidus specter, shards or Focus push toward the 95% cap at 272%.

Transient Fortitude, Umbral Intensify are the Strength for Gloom, with Primed Continuity holding Duration.

Stretch, Augur Reach set the Range, with Augur Reach also feeding the gate.

Primed Flow is the large pool for chaining combos.

Catalyzing Shields is the gate lock.

Blending Talons is the radial quick-cast.

The augments are all optional over a Natural Talent slot: Blood Forge to reload slow weapons via Bloodletting, Dread Ward for an invulnerability window, Blending Talons for the radial version.

The aura and exilus are open.

Pick one.

Subsume over Blood Altar (her 3).

- Gloom is the default: crowd control plus healing that fuels the Bloodletting loop.

- Breach Surge or Condemn for crowd control without the healing synergy.

Molt Augmented for Strength toward the Gloom cap, Arcane Arachne (applies to Dread Mirror).

Arcane Avenger with Combat Discipline, or Arcane Strike on a Talons build, as swaps.

Any.

Madurai or Zenurik help hit the Gloom cap.

Vazarin Sling for a panic i-frame.

Garuda's +100% damage passive applies twice to Glaives and Exodia Contagion.

Talons builds (light combo, heavy spam, hybrid x12) are the signature option.

Blood Forge pairs with slow-reload weapons like Kuva Zarr, Felarx, Tenet Envoy.

Dread Mirror frontal attenuation plus the Gloom slow plus shield gating off 4 plus Bloodletting's status cleanse.

It fails to attacks from behind (Dread Mirror is frontal only), and to toxin.

The Bloodletting-Gloom loop is self-sustaining once started.

Primed Flow holds the buffer.

Attacks from behind bypass Dread Mirror.

Bosses.

Hitting the Gloom cap needs external Strength sources.

A high-range non-helminth nuke build.

A run-and-gun weapon platform with Molt, Roar or Xata's.

Strong: top-tier slow, near-immunity from the front, self-sustaining energy, flexible damage.

Weak: frontal only, boss-blind, Strength- starved for the full slow without help.

Players who want a control-and-survival frame that slows the whole room and shrugs off everything it is looking at.