the pro's try to make the second row balls go in the side, 5and 6 balls in post above. down the middle mainly. maybe a bit to one side or the other of the spot on the headstring. hit cb just a bit low not much. with that you should be trying to park the cb in the center of the table. also the corner balss may go 4 rails into the corners.
you should be sure the first 3 balls on both sides of the rack are froze to get the right trajectory to the side pockets. the balls that go in the side get that from being frozen to both balls they lay between.
in other words the 5+6 have to be frozen to the 1 ball and the 2 and 3
in the diagram above.