Thats an intersting breakdown. We should almost get a test that people can do to test their level against other players. The ghost is one of the greatest challenges.
ATM I play the ghost by breaking, taking ball in hand after the break, and then attempting the run, if I miss I lose the game and rerack and try again. I can almost always beat the ghost in a race to 9 doing this now.
A lesser player could allow for a miss and taking a second ball in hand per each game, lesser then that taking a 3rd bal in hand after a miss. Using the above system it would seem that is a person can be the ghost with ball in hand off the break they are playing close to a A level, a B level player would beat the ghost with ball in hand off the break and a extra ball in hand each game after a miss, and lose normally with the ball in hand off the break and loosing after a miss. The C player would need the initial ball in hand and the 2 extra chances/ball in hands per a rack to beat the ghost. D player, yet another BIH.
The next step I would imagine would be to take the ball in hand away from the break, but that makes it ALOT harder, I would probably have a tougher time beating the ghost then as in at least 1/3rd of the games you are going to have a pretty poor looking table and look at the 1 on average, barring you make it in the side and have to get a decent look at the lowest ball. That initial ball in hand puts you in control of the table, without it you are often required early to make a great shot to get in shape to make the run.
The only problem with systems such as this is that alot of people have trouble playing the ghost, they dont play it like they play another live person, whether better or for worse. All the same the above system would be easy for people to test themselves and see where they stand.