Is there is no pat answer. It depends on where you want the point of pattern impact relative to the point of aim and how the rib is set up. There is no law that ribs are parallel to the bore nor is there a standard as to how high above the bore axis the rib actually is. Further, nobody but you actually knows what you see when shooting.

Spend some time actually patterning for POA vs POI, take rib measurements, and then pay attention to what works for you when shooting targets.