The beat the song is built on is one bar, played through bars 13-41 and 52-67 -- 71.4% of every bar the kit plays. Learn that one and the song is very nearly finished.
It is played on hi-hat, snare and kick, counted in sixteenth notes. On its own it scores 77 out of 100 -- demanding -- and the thing that decides that is how many notes a second it asks for.
The whole song is 82 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 hi-hat, snare and kick, in 4/4 at 120 BPM, counted in sixteenth notes. It is written out above, and it covers 71.4% of the bars the kit plays.
Bars 13-41 and 52-67. The time is kept on the hi-hat to start with, and it changes 2 times over the song.
77 out of 100 on its own -- demanding. The song as a whole is 82 out of 100. Hard, and what makes it hard is the independence between the hands and the feet.