The reality is that [Dex Pixia] outmatches the [Diwata] in every way. There is no reason besides for the fun of it to use this weapon over your pistols. However, it does offer one mechanical use.

Razorflies are buffed by certain Mods Equipped to the [Diwata]. However, melee damage mods do not (with the exception of [Condition Overload]). This build optimizes the damage of the murder butterflies to be as high as possible.

With this Titania build and these mods + Full Moon from Tribute, you [Reach] 24,316 dps per razorfly. Its not bad for the normal star chart, especially considering this is fully optimized, but sadly still not useful on the steel path except for some small chip damage.

*note to self: experiment to see if Razor Flies can benefit from melee combo counter. Doubt they can increase it on their own.