-This is a build for the beam mode of Incarnon upgraded Atomos (currently the best secondary AoE beam in the game).
-For buffed shields Corpus, toxin kills faster: https://overframe.gg/build/491573/.
-For Infested/armored Steel Path missions this build with 2 corrosive Archon shards kills faster: https://overframe.gg/build/491559.

-Incarnon Evolutions:
II) Only Paladin Virtue makes it worth over Kuva Nukor for frames that can achieve the requirement (Archon Flow and/or Archon shards).
Otherwise, you're forced to let your shields break every 8 sec with Hoplite Virtue & Elemental Balance evolutions & either a) drop both crit mods for Scorch & Expel Corrupted/Grineer or b) drop Gambit for primed Expel (higher dps).

III) Preference. I don't think 1.2s reload warrants using Resonant Restore's magazine increase, so I'd personally go ammo evolution (Mercenary Chamber) + range exilus or range evolution (Moonrise Velocity) + ammo exilus. 21 pickups with ammo exilus (12 with primed version) are needed to break even with Mercenary Chamber.

IV)
i) With Arcane Avenger active, Elemental Balance & an Expel Corrupted/Grineer over Primed Pistol Gambit yields max dps, but keep in mind Avenger isn't consistent (only lasts 12 sec, realistically 10, while often taking more than 8 kills to proc).
ii) Without Arcane Avenger active,
1) Survivor's Edge & the above build or
2) Elemental Balance & Primed Expel (not normal Expel) instead of Primed Pistol Gambit (vs targets that take 2 or more seconds to die).

BUILD DETAILS
-Don't add more fire rate instead, it'd waste ammo too quickly in lengthy/low enemy density missions.

-Lowering viral ranks to increase heat status weight doesn't increase dps here, as it also lowers total status chance.