Question about Mississippi Hole Card edge

I have recently found an opportunity where I am able to consistently see the dealers flop card in Mississippi Stud, however the majority of the time I am only seeing partial information. With near 100% accuracy I am able to tell if the card is a 2-5, 6-10 Or J-A. I am trying to calculate what, if any edge this information will give me if I act accordingly using the “point” system described on wizard of odds. I know that if I were to get the exact information of every flop card it would be roughly a 54% edge, just trying to figure out how far this edge drops when only getting the “low” “middle” or “high” value of the card. Wondering if anyone else has worked this out before.