The beat the song is built on is one bar, played through bars 6-12, 14 and 16-20, and 15 more places -- 15.8% of every bar the kit plays. This one moves around more than most: the beat is where to start, not the whole job.
It is played on hi-hat, snare and kick, counted in sixteenth notes. On its own it scores 74 out of 100 -- demanding -- and the thing that decides that is how many notes a second it asks for.
The whole song is 69 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 105 BPM -- and adds the notes back over 5 rungs, each with a tempo to reach and a gate to pass before the next.
Tempo goes 105, 126, 147, 169 and 190 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 190 BPM, counted in sixteenth notes. It is written out above, and it covers 15.8% of the bars the kit plays.
Bars 6-12, 14, 16-20 and 22, and 14 more places. The time is kept on the hi-hat to start with, and it changes 20 times over the song.
74 out of 100 on its own -- demanding. The song as a whole is 69 out of 100: demanding, mostly on the independence between the hands and the feet.