The beat the song is built on is a 2-bar phrase, played through bars 7-10, 25-29 and 37-40, and 5 more places -- 34.7% 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 62 out of 100 -- a step up -- and the thing that decides that is the independence between the hands and the feet.
The whole song is 70 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 107 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 107, 127, 146 and 165 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, hi-hat, snare and kick, in 4/4 at 165 BPM, counted in sixteenth notes. It is written out above, and it covers 34.7% of the bars the kit plays.
Bars 7-10, 25-29, 37-40 and 55-59, and 4 more places. The time is kept on the silence to start with, and it changes 3 times over the song.
62 out of 100 on its own -- a step up. The song as a whole is 70 out of 100: demanding, mostly on the independence between the hands and the feet.