I would like some some advice on this build please

I'd recommend jack-o-lantern. Shes really vulnerable to special procs that will put her out of vengeful fighter range b4 she can activate brazens

Honestly it looks pretty good. I think unless you are going for a purely enemy phase build, you could stand to change your weapon. However, if you wanted, you could pretty easily use some stance or breath skills and accomplish something similar without the hp threshold. Overall it is a solid build, not much more you can do with it.

Gonna assume special fighter isn't an option

But if you can spare the dew, her unique axe is best for her.
Even with vengeful fighter, the speed helps avoid doubles at the very least.

Also, I think brazens might not work that well.
you could go for close def, steady stance or even fury for her A slot.
And close def or fierce stance as seal. Have her be stronger from the start.

This build basically says, “if you don’t 1) kill me in one shot you’ll rue the day. and 2) I hope you brought a red mage or effective against armor unit because again, you’ll rue the day.”

If she gets on brazen range she’ll be impenetrable by physical attacks yuck. I love this.