The beat the song is built on is one bar, played through bars 7-12, 14 and 16, and 2 more places -- 31.3% 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 and kick, counted in sixteenth notes. On its own it scores 78 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 83 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 83, 99, 116, 133 and 150 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 one-bar groove on crash, ride, snare and kick, in 4/4 at 150 BPM, counted in sixteenth notes. It is written out above, and it covers 31.3% of the bars the kit plays.
Bars 7-12, 14, 16 and 18, and 1 more place. The time is kept on the ride to start with, and it changes 2 times over the song.
78 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.