Back in the day, I used a number of tricks to back off an MDA and timing to make a visual descent point.
I would explain how easy it was and how well it worked...plus using 5 times your groundspeed for a descent rate from the visual descent point to make the runway.
Indeed JEPP even published VDPs
But since the world now has every gadget in the world, why should I tell you.
But it worked great...a simple, very simple formula to reduce timing to the MAP to find a VDP...
oh, back then we flew the plane too. and the jets went faster cuz gas was cheaper.