Both augments are mandatory. [Shadow Haze] is required to create 3 roaming shadows that can each trigger the true damage. [Dark Propagation] allows enemies killed to self spread Sow, meaning it can spread across a wider area without recasting Sow.

Enemies affected by Sow who are then subsequently hit by Reap take true damage equal to 25% of their CURRENT health. This value is NOT affected by ability strength, but is affected by Viral (2x at 1 stack and 4.25x at 10 stacks) and Roar. You need exactly 255% strength on both Reap and Roar to one-shot enemies without viral status. You may be able to get away with using [Precision Intensify] if you have enough strength on reap to save forma.

Use this spreadsheet to calculate exactly what components you need to hit the one shot threshold (made by me, to use click file -> make a copy, do NOT ask for edit permissions please): https://docs.google.com/spreadsheets/d/1qXQBttYGe6qfG1xruv9YDpgb1YON4LitOhrUfifu2oU/edit?usp=sharing

Use this for Shadow to help reviving: https://overframe.gg/build/457771/

HELMINTH

ROAR is MANDATORY for the one-shot threshold.

You can subsume over EITHER Gloom or Shadow depending on preference. If you would like to focus purely on nuking while in normal [Sevagoth] or [Hate] using shadow, subsume over shadow. If you like to switch it up and occasionally switch into shadow, swap over Gloom. Gloom provides decent crowd control in certain situations but does not affect eximus, and also consumes alot of energy.

SURVIVABILITY

1. Shield Gating: Catalyzing shield reduces your shields by 5x, but currently having ANY amount of shield gives you a full 1.33s shield gate upon breaking. If you regenerate shield via [Brief Respite] after casting 1 or 2, you can reset this gate to full. Since you constantly spam 1 and 2, you can stay in a constant cycle of refreshing your shield gate.
2. Vazarin Protective Sling: for absolute safety, I would recommend running the vazarin school protective sling which gives you on demand 5s invulnerability when you sling through your frame. Having [Magus Cloud] on your operator is very helpful to make this even easier.

STAT BREAKDOWN

Duration
Keep positive to maintain Roar uptime and reduce Gloom drain.

Efficiency
[Equilibrium] is sufficient to maintain energy since you only need to cast 1 occasionally when new enemies spawn which only costs 25 energy.

Range
The true damage component only affects enemies hit DIRECTLY by shadows. The radial component is blast damage and doesn't scale with range either. Range does affect Sow but since [Dark Propagation] allows it to self propagate, you don't need too much range to get this going.

[Archon Stretch] can be procced by [Arc Coil] on [Diriga] and is optional for free energy [Regen]. Note you CAN regenerate energy passively while Gloom is active as long as there are no enemies in range.

Strength
Strength does NOT affect Reap damage, but is needed for Reap debuff, Gloom slow, Roar buff and affects the Crit chance buff of Shadow Haze.

ARCHON SHARDS

1 tau Amber Cast Speed
3-4 tau Crimson Strength gives 45% to 60% strength, MANDATORY to hit the threshold, but you can vary this if you have other strength sources e.g. [Power Drift], Madurai, Zenurik. The fourth shard would allow you to drop Power Drift for primed sure footed.
1 optional flexible shard shard slot if you run power drift- duration to improve roar uptime, parkour velocity for mobility, energy orb effectiveness for more energy

Arcanes
Arcane Energize/Steadfast - if you need extra energy economy help (note : Steadfast prevents consistent shield gating).
Arcane Concentration - gives 60% duration to help longer roar
Molt Augmented - if you run this, you could do either free up shards OR mod slot for rolling guard, but you would need to stack with kills and lose energize/concentration

ARSENAL

Weapons to help generate energy:

• Tenet Glaxion with Photon Overcharge: https://overframe.gg/build/668833/
• Miter Incarnon with Primary Exhilarate and for popping nullifiers in corpus/fissure: https://overframe.gg/build/219227/
• Grimoire with Xata Invocation: https://overframe.gg/build/569013/

Companions:

• Shade: https://overframe.gg/build/441583/. Keeps you invisible while you only cast abilities, giving a much easier time with survivability. Can use Coolant Leak to help generate health orbs for energy, but has low consistency
• Diriga: https://overframe.gg/build/541464/. Arc Coil gives highest consistency for priming enemies passively and generating health orbs for energy.
• Wyrm: https://overframe.gg/build/545608/. Negates status effects including knockdown, very good if you don't own [Primed Sure Footed] and to [Protect] against slash procs in grineer missions. Can also use [Coolant Leak] but has low consistency.