You should be doing 1/2 and 3/4/5 at the same time. For 3 a constant speed or tapered speed is irrelevant. You just need to make sure that you are depressing the clutch and letting of the gas / releasing the clutch and pushing in the gas at the same time. The key to smooth shifting is to rev match, then you don't jump from say 3k RPM to 4k RPM causing the car to 'kick'. Speed really nothing to do with being smooth, once you master smooth shifting, then you can easily start shifting faster.
Play around with it. Practice makes perfect!
