I wanted a build without Riven nor faction mods for the lowest forma possible while fully understanding the weapon so with homework I made this guide.

Mod position is so you can change Heat to Toxic and flip Radiation to Corrosive damage.

The burst fire drops ur normal crit chance from 25% all the way down to 3% but in exchange adds free viral damage with ur Radical (Aoe) damage.

Since your radial attack applies viral for free we don't need to build for it. With this build your Attacks apply Radiation + Cold plus Viral from the AoEs. The mod placements is so you can change to magnetic if you wish.

[Chilling Reload] will give us the largest substained dps excluding Riven followed by a PRIMED faction mod.

Lastly the mod that does the least for the build is [Frigid Blast]. Since you aren't always firing and reloading I will obmit fire rate and reload from the selection although after Riven and faction mods they do give more substained dps.

In terms of increasing substained dps the best mods in order are as follows;

Riven 84.1% , PRIMED/normal Faction 55/30%, Blaze 18.6%, Vigilant Armaments 18.3% then it drops down to 10.9 for the 60/60 satus mods. If you do want to play around with mods these are the recommended