The first thing is to ask yourself is do i hook the ball? Do i have a high rev rate? Do i have a high ball speed?
I’ll start out with people that hook the ball with a high rev rate. When you have a high rev rate like me, the ball will read the lane much early then most. When finding your best rotation you gotta look at the lane conditions and the ball your using. If your ball is drilled for max hook, and the lanes are oily, you would want to have a 3-9 o-clock to 4-10 o-clock rotation. By having this rotation it allows your ball to get through the front put of the lane and explode on the back end for max hook. But if you have a high rev rate and your using the same ball when you hook it and the lanes are dry, you must have a more end-over-end roll like 4.5-10.5 o-clock to a 5.5-11.5 o-clock roll. By having this end-over-end roll the ball wont read the lane right away, the result of throwing the ball like this is a much straighter down-and-in shot.

For those that like to throw the ball straight, there is a good chance that you have a lower rev rate. When the lanes are oily and your having a hard time hitting the pocket you have to have more of a 5-11 o-clock roll. The reason for this is because of the lower rev rate the ball will hook more than if you had a high rev rate. Another thing is that throwing the ball like that, you create lots of carry and back end.