If you are looking for a basketball drill that is going to cover several different offensive scoring moves all in the same drill, this is a good one. The diamond drill is going to work on your ball handling, scoring off the dribble, finishing at the rim, moving off of the ball, and then scoring off of a pin down screen.
Also, if you have a large number of players that you are working out you can do this drill with 5-6 players, without it being too crowded. Becoming a complete player requires you to be able to be able to handle the basketball and score in a variety of ways. That doesn't mean that you don't have your strengths, but you still need to be adequate in the other areas as well.