The beat the song is built on is a 2-bar phrase, played through bars 29-35, 61-63 and 65-67, and 5 more places -- 29.2% 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, high tom, kick and hi-hat foot, counted in sixteenth notes. On its own it scores 59 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 65 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 75 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 75, 88, 102 and 115 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, high tom, kick and hi-hat foot, in 4/4 at 115 BPM, counted in sixteenth notes. It is written out above, and it covers 29.2% of the bars the kit plays.
Bars 29-35, 61-63, 65-67 and 69-75, and 4 more places. The time is kept on the silence to start with, and it changes 7 times over the song.
59 out of 100 on its own -- a step up. The song as a whole is 65 out of 100: demanding, mostly on the independence between the hands and the feet.