The beat the song is built on is one bar, played through bars 19-24, 27-29 and 31-33, and 10 more places -- 33.1% of every bar the kit plays. That is the spine of it; everything else is what happens around it.
It is played on snare, mid tom, floor tom, kick and hi-hat foot, counted in sixteenth notes. On its own it scores 58 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 73 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 63 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 63, 74, 86 and 97 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 snare, mid tom, floor tom, kick and hi-hat foot, in 4/4 at 97 BPM, counted in sixteenth notes. It is written out above, and it covers 33.1% of the bars the kit plays.
Bars 19-24, 27-29, 31-33 and 35-37, and 9 more places. The time is kept on the snare to start with, and it changes 3 times over the song.
58 out of 100 on its own -- a step up. The song as a whole is 73 out of 100: demanding, mostly on the independence between the hands and the feet.