While people say that this is one of the best early game weapons for Firebug, I feel like most of that talk's coming from its utility in Zed Time. Outside of it, I find it to be one of the most annoying weapons to use due to its cumbersome reloading compared to other Firebug weapons. Because of this, I think it might be worth it to give the Firebug a hidden third skill at Level 15 that he will unconditionally gain that does the following:
Level 15: Burn
Dual Spitfires proficiency (unlisted)
The Dual Spitfires will now use the Elite reload animations, but are subject to a 20% reload speed penalty. This is intended to stack with the Firebug's passive reload speed per level. This skill is always active regardless of your Level 15 skill choice
Here's how this will change the reload speeds for firebug:
Level 0: 2.75s half, 2.91 empty (same as before)
Level 14: 2.36s half, 2.51 empty (same as before)
Level 15: 2.11 both (was 2.33s half, 2.47s empty)
Level 25: 1.91 both (was 2.06 half, 2.18s empty)
This would also give the Firebug's dual pistols a much cooler-looking reload animation that would otherwise only be accessible to the Gunslinger and Survivalist.
Level 15: Burn
Dual Spitfires proficiency (unlisted)
The Dual Spitfires will now use the Elite reload animations, but are subject to a 20% reload speed penalty. This is intended to stack with the Firebug's passive reload speed per level. This skill is always active regardless of your Level 15 skill choice
Here's how this will change the reload speeds for firebug:
Level 0: 2.75s half, 2.91 empty (same as before)
Level 14: 2.36s half, 2.51 empty (same as before)
Level 15: 2.11 both (was 2.33s half, 2.47s empty)
Level 25: 1.91 both (was 2.06 half, 2.18s empty)
This would also give the Firebug's dual pistols a much cooler-looking reload animation that would otherwise only be accessible to the Gunslinger and Survivalist.