Tired of seeing Volts all the time as the main DPS during Eidolon hunts? Me too.
Luckily Quincy is here to tag in for an alternate playstyle. Best paired with Lettie ([Trinity]) for maximum effect

Modding concerns:
Only focus is Duration and Strength as that's what Evade, Eclipse, and [Neutralize] rely on

Energy
In order to supplement our energy, use Arcane Energize in place of nullifier and a companion with Energy support.
If you want [Regen], you can swap out [Primed Flow] (Or [Streamline] if you're willing to drop in another Forma) for [Archon Stretch] and use companion abilities to proc electric to trigger
Though energy [Regen] is more easily acheived by pairing up with a [Trinity] with Energy Vampire

Helminth
We use Eclipse as the subsume since it double dips weaks point bonuses and acts as a faction mod since faction mods don't exist for sentient, this grants a huge increase in damage.
Note: You MUST subsume over Resupply since resupply counts as a damage boost
Note: The weakpoint bonus on a synovia is x1 so it doesnt actually provide extra bonus damage, but instead an extra instance of damage. Still very beneficial

Loadout:
Neutralizer build
Primary and secondaries: Anything that can support the build like energy [Regen] through things like a [Grimoire] or an entropy weapon
Melee: An armour stripping gunblade with [Shattering Impact] such as this vastilok (This is optional as you get so much raw damage through the [Neutralizer] anyway)
Companion: To Supplement the invisibility, I suggest using either a [Shade Prime] sentinel or a Huras Kubrow

Gameplay loop:
1) Drop Eidolon Shields
1.5) Use gunblade to strip synovia armor (Optional)
2) Cast Evade to go invisible
3) Cast Eclipse
4) Summon his [Neutralizer]
5) Shoot the Synovia
6) Go to 1

Optionally: If you can deploy it close enough to the eidolon, cast seek in order to increase damage output
(May change helminth options based on some testing once I can)

Note: Evade has a 60 second cooldown after your invisibility runs out, so either prepare for that, or ustilise ways to kill smaller enemies like voms or random grineer to increase the timer