Three strikers is never enough even if they are three of the best. Dzeko and Balotelli were both out at the same time at one point last season leaving us with only Aguero available. That's unacceptable for a top club, you always have to have strength in depth. At one point last season United had Rooney, Welbeck, Berbatov, Hernandez, Owen, Macheda, Diouf, and Keane all available. Eight forwards. Not saying we should have this many but even if it means taking Louis Saha on a 1-year deal as 4th or 5th choice striker, you need the extra numbers just in case.