Infinite Ammo on headshots. Extremely easy to build sniper combo and can oneshot level cap. Punchthrough and fire rate is very good on rifles. You can use Vile Acceleration if you don't have Primed Shred.

Primed Bane of Grineer Faction mod is better on tankier targets such as for Disruption Demolysts. Replace Galvanized Scope with faction mod for longer endurance runs as it becomes harder to get headshot kills without armour strip. In terms of damage difference, a Primed faction mod's damage increase is worse than 3 stacks or above of Galvanized Scope.

If you are running armour strip, you no longer have to worry about not stacking Galvanized Scope. Replace Critical Delay with Infected Clip and put a Primed Faction Mod in the original slot of Vital Sense. Vital Sense can be moved to Malignant Force's polarity-less spot. This will provide the highest damage output.