I am a ding-challenged putter. I started out moving the aim point to correct the slope but couldn't hit the ding consistently and missed many putts. I got frustrated and started hitting off-ding left and right to compensate for the slope. After a bit of practice I found that I was sinking more putts than trying for the ding. The more the slope, the more miss of the ding is needed. The only other thing I do with that method is add 1yd to the distance I need to compensate for the lack of distance caused by the missed ding. I'm pretty sure others use that and have been in the forum, but I thought I'd mention it.
The other is for those consistent dingers. It has to do with time. The distance between 2 lines on the green is 2ft., I figured if I knew how long it takes a ball to travel over a distance and knew how long it took one of those slope dots to travel between 2 lines, I could figure out how far I would have to adjust the aiming point. I went to hole #1 green on Andy in "practice mode" and used "0" slope( up/down, left/right) areas I found on the green. I hit 5, 10, 15, 20ft shots and timed (counting one-one-thousand, two-one-thousand, etc. in my head) each shot how long, in secs., it took to go that distance. With that info I took it to the field and it seems to work pretty well or got damn close. A couple of examples below:
Very Fast Green- 12ft takes 4sec., this is the "constant" I found on Andy's green. You're on a VF green, 12ft from hole. the slope moving dots take 4sec. to reach the next line, you position the aiming point 1 line (2ft) away from hole because the ball will "fall" 2ft in 4secs. If the dots take 3sec. between lines, you position the aiming point 1 1/4 lines away from hole. If dots move 6sec.between lines, position the aiming point 1/2-line (1ft) away from hole, 2secs slower is 1/2 of 4sec."constant".
If the dot travel time is slower than the "constant", you aim toward hole, and faster aim away from hole.
It's just a theory, but it seems to work. On some shots, alternating slopes will tie your mind in a knot. You'd have to do your own "constant" timing numbers, some of mine don't make sense, ie: standard green 6ft =2.25sec, Fast green=2.5secs.
Like I said, I'm a ding-challenged putter and mostly use the left/right ding method but when the slope is pretty constant I use the latter...it gives me a good chance.