General use [Ignis] build.

The weapon arcane adds more than enough base damage to sustain the gun without [Serration].

[Galvanized Aptitude] add 240% extra dmg (3 status: viral, heat and bleed), and its a better overall option to [Serration] because there is always a chance to get extra status from a teammate.

If you are using a Panzer then switch [Rime Rounds] for [High Voltage] to get corrosive and 80% extra dmg to Aptitude.

As the weapon have a fast base reload and no ammo issues, use the headshot arcane for the extra 30% headshot damage.