It has a low critical potential so i prefer focusing on a status build.
Use Primary Merciless instead of Primary Deadhead if you want, it is your choice.
If you find changes that could make this build better, post them in the comments and the reason, no toxicity pls :).
Vigilante Armaments helps with damage and status (More multishot = More status in one shot), but if you have a nice status/damage riven, replace it (Needs an extra forma).
I use [Terminal Velocity] because the bullet speed hurts me, if you are comfortable with the default speed, replace it with ammo mutation or whatever you want (you may have to use another forma).
It works for me in steel path, it has a good damage (Viral + corrosivo + heat = love).
Also, it has a small area effect that can help killing hordes.
I recommend using this weapon with the [Knell] (Prime), the [Scourge] (Prime) has a secondary fire, you literally throw the weapon, affects enemies in an area, all bullets shooted at 2 meters max. of the enemy's head will be redirected to the head, [Knell] (Prime) only has one bullet magazine, but if you hit in the head, the weapon gains 100% ammo efficiency (keep hitting in the head = infinite ammo), so it's a great sinergy.
Obviously, when you throw the weapon away, (you can't use it, to [Recover] it you just have to touch it, if the weapon glitches and suddently disappear it will return to you after a while (or if you don't [Recover] it).
Reworked: now after throwing it, you will magically generate another.
Honestly, i love this weapon.