Been using this ever since the event that spawned it and it has done well by me without needing a ton of forma. Will melt level 150 bombards and heavy gunners with head shots. To me exilus mods are hardly worth the hassle so I just stuck whatever on there, but an extra forma would allow a fully ranked exilus mod. If you must, I'd suggest [Vigilante Supplies] as this thing will eventually eat your ammo at level 100+ grineer survivals even with [Carrier].

In this case I forego the 99% status and trade it for more damage since status stacks only go up to 10 now. You will get your 10 stacks quickly still due to [Vile Acceleration].

Do not bother with the cubes. Back in the day, the things were a nuke if you ran up into a enemy's face and spammed them, but those days are gone. The cubes were nerfed (now needing manual detonation for full damage), blast damage was killed, and the weapon was power creeped.

For use against Corpus, swap out [Stormbringer] for [Infected Clip] and [Malignant Force] for [Rime Rounds]. This will create Viral + Electricity.