At 8 forma, this build is not for the faint hearted and does represent a significant investment.

In my opinion though, this is comparable to, if not better than, pre-nerf carchmoon. The aoe aspect of this make it a literal room cleaner but you'll need a way to mitigate the stagger.

[Lethal Momentum] is a good choice as it reduces the arc of the projectile and increases the range.

I've not built viral as this isn't a status build, things will be dead before you can proc status. This is just crit and raw damage. Corrosive will get a 75% increase against ferrite armour.

I've went for pax charge because never having to reload means increase in dps.

This is a serious build for players who want to max their damage output. There are less expensive options for more casual players which are still viable.