first the [Volt] (DPS) build this build is used to buff your weapon damage as much as possible,

first you have your 1 with the augment [Shock Trooper] to boost your electric dmg (note that smg will act like a mod and combine with other elemental mods)

your 2 cast it before going into the archwing to move way faster in archwing

your 3 give you a 2x crit dmg multiplier and a boost in electric dmg (this electric dmg won’t combine with other elemental mods

and to finish your 4 as to be replaced with eclipse (by using the helminth systeme found from Son in the Necralyst on Deimos) which gives you a huge weapon dmg boost.

so let’s look at the build :

First the Aura mod, depending on what you use, replace it with what is needed:
[Dead Eye]: if you use a sniper.
[Rifle Amp]: if you use a rifle.
[Pistol Amp]: if you use a pistol.
[Holster Amp]: to get a dmg boost when swapping weapon.

Then the Exilus mod, i recommend using [Preparation] for your energy economie in combination with (primed) [Flow] and not having to spam the energy pads.

after that you have your regular mods:
[Transient Fortitude], [Blind Rage] and [Umbral Intensify] for your ability strength.
[Umbral Vitality], [Adaptation] for survivability.
[Shock Trooper] for the bonus electric dmg on hold casting the 1.
[Narrow Minded] for ability duration.
[Primed Flow] for energy economie

and to finish the arcane:
Arcane Nullifier to avoid the magnetic proc from the magnetic waves done by the eidolons and from the water at night in the plains
the second arcane is a flex slot us it how ever you like,
Arcane Momentum for sniper reload speed
Arcane Velocity for secondary fire rate
Arcane Acceleration for primary fire rate
…

for a more complete guide: Eidolon 101