The beat the song is built on is one bar, played through bars 12-14, 16-19 and 38, and 14 more places -- 31.2% of every bar the kit plays. That is the spine of it; everything else is what happens around it.
It is played on crash, hi-hat, snare and kick, counted in sixteenth notes. On its own it scores 59 out of 100 -- a step up -- and the thing that decides that is how many notes a second it asks for.
The whole song is 66 out of 100, so the beat is most of what the song asks for. Get it clean and the rest follows.
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 104 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 104, 123, 141 and 160 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, hi-hat, snare and kick, in 4/4 at 160 BPM, counted in sixteenth notes. It is written out above, and it covers 31.2% of the bars the kit plays.
Bars 12-14, 16-19, 38 and 41, and 13 more places. The time is kept on the kick and crashes to start with, and it changes 18 times over the song.
59 out of 100 on its own -- a step up. The song as a whole is 66 out of 100: demanding, mostly on the independence between the hands and the feet.