The beat the song is built on is one bar, played through bars 21-23, 25-27 and 29-31, and 17 more places -- 35.5% of every bar the kit plays. Learn that one and most of the song is already under your hands.
It is played on crash, snare, high tom, mid tom, floor tom and kick, counted in thirty-second notes. On its own it scores 74 out of 100 -- demanding -- and the thing that decides that is how much of it falls off the beat.
The whole song is 78 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 66 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 66, 80, 93, 107 and 120 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, snare, high tom, mid tom, floor tom and kick, in 4/4 at 120 BPM, counted in thirty-second notes. It is written out above, and it covers 35.5% of the bars the kit plays.
Bars 21-23, 25-27, 29-31 and 33-35, and 16 more places. The time is kept on the snare to start with, and it changes 14 times over the song.
74 out of 100 on its own -- demanding. The song as a whole is 78 out of 100: demanding, mostly on the independence between the hands and the feet.