9, it's better to have the same breakpoint down the lane, than in front. When it's in front, the heads break down, and the ball won't slide/skid in the front, which it's supposed to do.
The pattern I put down, allows for straight players to play outside(first arrow), tweaners to play 2nd arrow, and crankers to play 3rd. It also allows you to switch balls, either stronger or weaker, moving left or right, and still give you a skid, roll, hook reaction, across the whole lane..!!
Because bowlers will be able to play different lines, the lanes won't get tracked up as fast. Plus, using heavy amounts of oil, when they do break down, the lane will flatten out and not get reversed(drier in the front and/or middle). =:^D