I've been spending a lot more time shooting with my left hand, and shooting one handed in general. As I read more and more about violent encounters, it seems a large percentage of them are dynamic, i.e. shooter(s) in motion.
So, I spend about 25% of my time actually working on typical 2 handed shooting, 25% strong hand, and fully 1/2 of the ammo goes out left-hand only. I, too, shoot high and right when doing it. But find if I can really concentrate and keep the crush grip on the gun Ayoob taught me, I notice very little degradation in accuracy.