That one is my nemesis as well.
I hit full backspin and TRY to land on the front or very top part of the green to the left of the pin maybe 3 feet or so and roll down. When I hit that spot it works perfectly, I just dont hit it very often! I actually eagled the hole once and just about fell out of my chair.
I usually find I have to subtract 5 yards from what I would normally hit too, try that one tip and you'll find that you dont roll past the flag 25 feet, I use to always have this happen as well.
Now I come up short just off the front more often than not and pitch it on with full backspin to roll down that slippery slope. The "drop zone" is a VERY small spot, so hitting it is indeed tough.
Maybe someone else can add something.
GL