Basically the question is how to play solitaire banks, as one might play the ghost in 9-ball. Here are two ways to do it:
1. Break the rack open, take ball-in-hand. Set a goal for how many banks without missing constitutes a "win" against the ghost. If you meet this goal ( 2 might be a win for a beginner, 4 for a strong intermediate), you win the game. If you miss before meeting the goal, the ghost wins.
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2. Combine banks with straight pool. The goal is to score 5-banks out of the rack. But, you can shoot non-bank shots (maximum of 4) to keep your run going and to allow you to get position to bank. Once you miss any shot, the ghost wins.