This is a very tricky solo. I still very much struggle with the “triple mini sweep” part I call it. It helps very much to play it slowwww. Get use to the picking first, then match the timing up with a metronome still going slow, and slowly speed it up as you get comfortable.
If anyone else has any knowledge on this and sees me making technical errors please say! This is just what I gathered on my own from watching a recent video of Syn