I assemble this build specifically with just 1 Primed mods so a lot of player can Use it.
(But if you don't have [Primed Cryo Rounds] you'll just save 1 forma but the build was still good)

I didn't use the Rifle Ammo Mutation because Vigilante Supplies not only have the same effects as Rifle Ammo Mutation but it also have 5% - 30% additional Critical Hits which makes the damage consistent at draining enemy out...

(other Vigilante Mods equipped will be applied as for me [Vigilante Offense], [Vigilante Fervor] and [Vigilante Armaments] is equipped on my [Deth Machine Rifle] ([Dethcube] default weapon) and I also have [Vigilante Vigor] and [Vigilante Pursuit] on my [Rhino] which makes it 30% just by equipping it)

I've tested this weapon on Elite [Sanctuary] and it performs well to clear all 8 Zones with just this weapon and [Rhino] as my Warframe

Since this Build was Highest in terms of DPS I've build another for this weapon which will be the Highest DPS but with Conditionals to get the Highest DPS

Build with Conditionals : https://overframe.gg/build/182207/ignis-wraith/ignis-wraith-highest-dps-build-conditional/