Mia + Atk / - Spd

It's Doable but her speed is her best niche since she has the highest speed in the game. if her boon was'nt +atk it'll be her worst IV.

Here is my build:
Weapon:Resolute blade
Special:Moonbow
A:Fury or LnD or deathblow(this is for just focusing on her attack)
B:vantage
C:Threaten def(flexible)
Seal:+spd/atk

It's really hard to fix her bane since it's her speed is her own niche.

Hello my Mia is the same as your’s But with Life and death she can make a great job.