Since [Saryn]'s already proccing viral, you can slash the enemy to death, with this side arm. If for some reason you need to.
I tend to just melee my problems away as [Saryn], but it's nice having a side arm that can solve any random issues.

Update! You're proccing statuses as [Saryn]! You now have [Galvanized Shot] on your [Pyrana Prime]! Now destroy!

This is also nice for use with [Nekros] because of the high slash damage splitting enemies apart.
Desecrate works on each dead chunk left on the enemy increasing your looting potential.

Feel free to replace [Carnis Stinger] with a Primed Expel mod for more damage, I just haven't gotten around to forma'ing this in game to see if I like it more or not.