There are 287 Total notes on the "Masta Ace/Jean Knight" song on Hard Difficulty. You can find this in the very first setlist "Scratchin' The Surface" This song's crossfades are very spread apart and easy to anticipate. It only has 4 - 5 directional scratches and they are really easy because you just need to scratch in a downward motion.
Don't forget to use euphoria if you think you'll get overwhelmed while tapping notes and doing crossfades, but it can be easily done without it with some practice.