Assuming you are a off break bowler
Stock off break - seam is usually tilted 45 degrees towrds leg side on rotation. This will give good spin and bounce for stock ball. Your stock ball should be the most dangerous one. If you tilt it more towards on side, it will spin more, but will be slow off the pitch - side spinner. If you tilt it less, it will spit off the pitch, but less spin - over spinner.
The ball that is release in front of the hand like a seamer is the arm ball. This ball will be quicker and flatter, and if bowled properly, will swing away from the right hander. (See Sanath Jayasuriya's arm ball). There is another arm ball, where you extend the wrist slightly at the point of delivery so the shiny surface of the ball will hit the pitch. For this, rough side shoud be facind the batsman. You just undercut the spin with our wrist. This ball will look very similar to a off break, will drift, drop but will not turn. (ex. Shakib Al Hasan)
Then Doosra, carrom ball etc . . Who c ares if you can bowl above four?