The beat the song is built on is one bar, played through bars 2-16, 68-83 and 118-132, and 3 more places -- 42.4% of every bar the kit plays. Learn that one and most of the song is already under your hands.
It is played on hi-hat, snare and kick, counted in sixteenth notes. On its own it scores 59 out of 100 -- a step up -- and the thing that decides that is how many notes a second it asks for.
The whole song is 65 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 120 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 120, 142, 163 and 185 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 185 BPM, counted in sixteenth notes. It is written out above, and it covers 42.4% of the bars the kit plays.
Bars 2-16, 68-83, 118-132 and 172-186, and 2 more places. The time is kept on the snare to start with, and it changes 22 times over the song.
59 out of 100 on its own -- a step up. The song as a whole is 65 out of 100: demanding, mostly on how many notes a second it asks for.