This build is intended for use with this Buff Saryn Build, with other frames you can play alongside a buffing Saryn this is also the build (Volt/Wisp/Nova/[Mirage]).

If you've played enough random pub arbitrations you're bound to have come across someone in your missions with an [Ogris] clearing every wave in a defense in 30 seconds. Here's how.

The bulk of this guide is on the Saryn build but as a run down:

-You don't need many damage mods as it all comes from Saryn
-[Heavy Caliber] over [Serration] because multishot + inaccuracy creates much bigger area coverage and you don't need an enemy to be in range of more than one hit.
-Bane mods are very helpful for going further but just using Serration instead will still easily get you to at least 50 Waves with you as the only DPS.
-[Ammo Drum] is specifically in combination with [Sniper Scavenger] aura, if you're not using this aura you will most likely need [Vigilante Supplies] instead, with an ammo pickup of 1 all ammo mutation mods do the same so may as well get the small set bonus.

Progenitor
Toxin is optimal as it works perfectly with the best primary element mod, Primed Cryo Rounds to make Viral. If you have a different Progenitor you can choose to ignore going for Viral or put Malignant Force/[Infected Clip] in place of [Magazine Warp]