So i been trying to replace fury on a couple of unit i have it on whats your opinion on this build

I'm not sure what you mean and how this relates to Fury. And regarding your actual build, your Lucina is stupid good speedy tank (basically a tankier Nephenee).

Great idea if you have some1 to cover her from mages (our Neko is perfect choice guess), otherways even my Boey will oneshoot her.