The beat the song is built on is one bar, played through bars 1-16, 18-33 and 36-48 -- 75% 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 69 out of 100 -- demanding -- and the thing that decides that is the independence between the hands and the feet.
The whole song is 77 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 119 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 119, 140, 162 and 183 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 183 BPM, counted in sixteenth notes. It is written out above, and it covers 75% of the bars the kit plays.
Bars 1-16, 18-33 and 36-48. The time is kept on the hi-hat to start with, and it changes 2 times over the song.
69 out of 100 on its own -- demanding. The song as a whole is 77 out of 100: demanding, mostly on the independence between the hands and the feet.