My experience is that the .245 front is way too tall. I use a .205 x .105 Dawson front with my Warren rear. It's almost dead on at 20 yards - prints right above the post, which works best for me.
Different strokes/different folks, but what’s the point of having the FO at POI on a 30-yard head shot? Your post is a wide as the head. On easy targets you can still put the dot at POI, if that’s faster – but I think center hold is more intuitive with irons on a pistol.