Your numbers look reasonable to me. You don't want to charge a spear unit like a warband from the front with cavalry in an actual campaign battle, of course.

I've never found wedge to be useful. If a target unit is weak enough to be charged from the front, a normal formation will also work and cause more casualties on the first impact. If one is charging a flank or rear, what's the point of a wedge to begin with? So I've never used the formation in my games... The AI uses it sometimes and has been spectacularly unsuccessful. Maybe there's something clever one can pull off with a wedge, but cavalry is fully capable of dominating the RTW battlefield without ever using it.