@XRay
You say that there's never really a point where you can have "too much" Spd, even from a defensive standpoint. However, looking at my example with Darting Stance (a bit on the extreme side, I know), I find that I could pick something else that would have my stats go to other important stats like Def when the only people are doubling you are likely outliers like Ayra, Soleil, Nino, etc.
I'm curious as to how you would choose to go about this. The Ayra example is likely what you would call "Spd optimised", or just simply Spd dumped so she reaches 50+ (doesn't she prefer Phantom Spd for massive R.Astra?). The same goes to other examples, whereas I would more often see things like Nowis & Fae in the lower 30s in stead of defensive stats which only makes sense to me.