The beat the song is built on is one bar, played through bars 9-15, 17-23 and 25-31, and 8 more places -- 65.5% of every bar the kit plays. Learn that one and the song is very nearly finished.
It is played on crash, snare and kick, counted in sixteenth notes. On its own it scores 65 out of 100 -- demanding -- and the thing that decides that is how many notes a second it asks for.
The whole song is 80 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 101 BPM -- and adds the notes back over 4 rungs, each with a tempo to reach and a gate to pass before the next.
Tempo goes 101, 120, 138 and 156 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, snare and kick, in 4/4 at 156 BPM, counted in sixteenth notes. It is written out above, and it covers 65.5% of the bars the kit plays.
Bars 9-15, 17-23, 25-31 and 33-47, and 7 more places. The time is kept on the kick and crashes to start with, and it changes 16 times over the song.
65 out of 100 on its own -- demanding. The song as a whole is 80 out of 100. Hard, and what makes it hard is how many notes a second it asks for.