Replace riven with a bane mod.
This adds multiple heavy damage slash procs against singular targets, and requires literally no kills to do all of its damage.
This makes it an excellent weapon for taking out high value targets such as acolytes, demolysts, or even liches.
[Primed Cryo Rounds] is purely there to buff [Hunter Munitions], the cold isn't intended as a damage source.

The goal of this build is to make the dread incarnon mode into a shotgun crowd-clearer.
[Split Flights] adds spread so the AoE projectile hitboxes get a much wider and larger [Reach].
It does so much damage that [Hunter Munitions] almost becomes an afterthought, but it helps VERY much with tankier enemies.
This is an unquestionably mighty weapon to use against large groups of enemies, since the arrows get infinite penetration.

Imagine every movie you've ever seen with big armies of archers firing volleys into the sky, raining death upon their enemies.
That's this build.