Not really a fan of it personally. Scout rifles do less precision damage than hand cannons generally, and since Firefly damage is based on the precision damage, Fatebringer still does more damage with Firefly at 300 dmg to trash mobs than the Satienne Rapier at 331 dmg because of that. The Satienne Rapier does more damage to high-level enemies like major units, but with 13 bullets per mag, I rather still use Fatebringer even with the decreased damage to stronger enemies. Even the Vision of Confluence with Field Scout perk didn't take that majors without blowing through most of the mag. I prefer Another NITC with Outlaw than the Satienne Rapier because it has very similar stats and 20 per mag instead of 13 per mag.