The beat the song is built on is one bar, played through bars 10-24, 26-40 and 42-56, and 11 more places -- 61.1% of every bar the kit plays. Learn that one and the song is very nearly finished.
It is played on crash, hi-hat, snare and kick, counted in sixteenth notes. On its own it scores 72 out of 100 -- demanding -- and the thing that decides that is how many notes a second it asks for.
The whole song is 73 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 103 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 103, 124, 145, 166 and 187 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 crash, hi-hat, snare and kick, in 4/4 at 187 BPM, counted in sixteenth notes. It is written out above, and it covers 61.1% of the bars the kit plays.
Bars 10-24, 26-40, 42-56 and 58-65, and 10 more places. The time is kept on the kick and crashes to start with, and it changes 19 times over the song.
72 out of 100 on its own -- demanding. The song as a whole is 73 out of 100: demanding, mostly on the independence between the hands and the feet.