The beat the song is built on is a 2-bar phrase, played through bars 29-36, 41-48 and 72-79, and 12 more places -- 32.1% of every bar the kit plays. That is the spine of it; everything else is what happens around it.
It is played on crash, ride, snare, mid tom and kick, counted in sixteenth notes. On its own it scores 77 out of 100 -- demanding -- and the thing that decides that is how many notes a second it asks for.
The whole song is 90 out of 100, so the beat is not the hard part: what costs you is everything around it, the joins and the fills.
A part this hard is not learned by playing it slowly and hoping. The room opens it on its simplest reduction -- the timekeeper alone, at 110 BPM -- and adds the notes back over 5 rungs, each with a tempo to reach and a gate to pass before the next.
Tempo goes 110, 133, 155, 178 and 200 BPM, and the gate at each one is 8 loops in a row with no wrong note and no wobble in the time.
PRACTISE THIS BEAT →A 2-bar phrase on crash, ride, snare, mid tom and kick, in 4/4 at 200 BPM, counted in sixteenth notes. It is written out above, and it covers 32.1% of the bars the kit plays.
Bars 29-36, 41-48, 72-79 and 84-91, and 11 more places. The time is kept on the kick and crashes to start with, and it changes 9 times over the song.
77 out of 100 on its own -- demanding. The song as a whole is 90 out of 100. Hard, and what makes it hard is how many notes a second it asks for.