Help, Nino (SF)

Personally, I think she's fine as is, but if you wanted to, you could replace the B skill for Desperation.

I second Desperation. If you don't need to keep her arena score up, Fury is good too. It increases her bulk, the difference in offensive stats is marginal, it gives her a much better enemy phase, 32 resistance is enough that you could use ploy skills, and the recoil damage helps her activate Desperation.

You could also give her Gronnblade, since that weapon does absurd damage even with an attack bane, although Giga Excalibur should be fine if you use buffs.

Well, good old blade tome build will help you out if other things wont work for you. Something like blade + LnD (or her default skill) + desperation and you have her as powerfull glass canon.
(Pic of my main sweeper, Morgan if you dont believe me, she can one-shot pretty much anything exept for high res mages. Hone flyers is really strong and coupled with goad used for her to be that powerfull. Good luck)

Bueno, si no quieres usar el clasico gronnblade + fury + desperation, que con simplemente fortify fliers y hone atk/hone spd en C y SS ya te pondrías en 70 daño (76 ya si tienes hone fliers también), furia porque no solo te da un poco mas de fortaleza para aguantar el primer golpe, si no que ademas te ayuda a entrar en el rango de desperation, en estos casos para mí es superior a swift sparrow en mi humilde opinión).
Si no quieres usar gronnblade, pues simplemente cambiar acrobatics por desperation y ya estaría.
Obviamente reposition de assist skill y la skill C a tu elección.