This build is preferably used with something else buffing it's fire rate. (Like Gauss Prime )

Evo II:

Marksman's Hand
-30% Recoil
This weapon handles very well without recoil reducing mods, so this is not needed.

Swift Deliverance
+50% Projectile Speed
Projectile Speed is also fine but can be increased if you're having trouble with charging your Incarnon.

Rapid Wrath
+25% Fire Rate
This weapon has very slow fire rate. So, I went with this one.

Evo III:

Extended Volley
+10 Base Magazine Capacity
Pretty good if you're Felarxing the [Onos]

Hunter's Armament
10% chance to restore 10 Ammo on Kill
Interesting at first glance but doesn't restore Incarnon charges. Just use [Pistol Ammo Mutation]

Rapid Reinforcement
+30% Reload Speed
Increases reload speed and increases the speed in which your weapon transforms into Incarnon mode. So, I went with this one.

Evo IV:

Elemental Excess
+20% Base Status Chance
-10% Base Critical Chance
This weapon is better with critical chance and doesn't have the perks the [Felarx] or [Laetum] do.

Incarnon Efficiency
Headshots build +50% more Incarnon Transmutation Charge
This allows you to go into the incarnon form quicker. This build is focused purely on the incarnon, so I chose this one.

Lethal Lance
On Kill: +2.5 Punch Through for 20s.
Choose this one if you're felarxing it, it has a synergy with Impaler's [Ferocity]. Doesn't affect the Incarnon Form, and I'm pretty sure it doesn't stack either.

Evo V:

Sequential Skullbuster
On Consecutive Headshots: +30% Headshot Damage. Stacks up to 4x.
Does not work on Incarnon Form (Bug).
If you can headshot and want to [Felarx] this, I'd recommend this option.

Impaler's [Ferocity]
On Punch Through Hit: 200% Damage for 10s.
Damage is additive. (May be a bug).
Use this if you can't headshot and are Felarxing it. Synergy with Lethal Lance.

Devastation Cascade
Hitting enemies in Incarnon Form increases the Critical Chance and Critical Damage of the fully charged blast by 5%. Stacks up to 50. (250% Crit Chance & CD)
Superb with a grouping ability or [Nautilus]. So i chose this one.

With everything stacked you can one shot all acolytes.