The head ball hit can prolly vary by a full 1/4 ball, which means there is some leeway to hit it thicker/thinner to get the required CB movement. Hitting the OB thinner will not change the cross bank angle all that much. And if you hit it thinner to get more CB movement, you just need a hair of outside to straighten the CB return angle to what you need to get close to opponent's pocket.
If the CB speed is within a diamond of where it needs to be, the hit can be manipulated with various billiard-type strokes.
This is true my thinking was to thin the 5 put cue ball close to pocket and end rail. The 5 basically won’t move and the 9 will be close to center table. Yes it leaves the bank on the 9 which is my plan. A backward cut off the end rail is very tough. With the cue ball on the end rail if they don’t make the bank or get it real close they are going to leave a shot on the 5 which is still basically on the spot. Or you just have to move the 9 and reset from there. Ball count would also dictate the shot but if someone makes the backward bank I say great shot.