I've read all 9 pages so far. I dunno, I'm perplexed. While I understand the various methods to aim, with my brain and my perceptions, I can't imagine a simpler way to aim then to visualize the ghost ball, and aim the center (bottom, if you will) of the CB to the center of the imaginary GB.
When I was first learning how to aim, on some shots on which I simply could not visualize the GB consistently, I'd ID the contact points, then link them together, then from that determine the position of the GB, then aim at that. From that Reid/straightline diagram, I aim using the black line where it intersects with the yellow line. If I was a little unsure, I'd visualize the red line, then translate that to the black line, then shoot.
I understand everyone learns and perceives things differently, but for me, "see it, shoot it" works. I just picture the GB in my head, and aim the CB to it, even on shots where the center of the GB is well off the boundaries of the OB. And this is from someone who can manage to overcomplicate *anything*. Luckily, GB and aiming work for me.