The beat the song is built on is one bar, played through bars 19-25, 35-41 and 47-61, and 2 more places -- 32.3% of every bar the kit plays. That is the spine of it; everything else is what happens around it.
It is played on hi-hat, snare and kick, counted in sixteenth notes. On its own it scores 48 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 79 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 182 BPM -- and adds the notes back over 3 rungs, each with a tempo to reach and a gate to pass before the next.
Tempo goes 182, 213 and 243 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 hi-hat, snare and kick, in 4/4 at 243 BPM, counted in sixteenth notes. It is written out above, and it covers 32.3% of the bars the kit plays.
Bars 19-25, 35-41, 47-61 and 84-90, and 1 more place. The time is kept on the toms to start with, and it changes 14 times over the song.
48 out of 100 on its own -- a step up. The song as a whole is 79 out of 100: demanding, mostly on how many notes a second it asks for.