Saving a build I saw from CerebralCortex after moving stuff around for my own OCD arrangement. More Forma than any other weapons I have, but looks very impressive.
More Options:
For two less forma, you can replace Infected Clip and Primed Cryo Rounds with two 60/60 rounds.
CerebralCortex mentioned the build's weakness on Deimos where infested are immune to Viral because the polarity is locked in. No problem. Have a second configuration where you replaced [Infected Clip] with [Hellfire], and [Primed Cryo Rounds] with [Hammer Shot]. Full fire with more status and crit multiplier.
Damn, that's a lot of forma.