The beat the song is built on is a 2-bar phrase, played through bars 1-21, 38-56 and 73-82 -- 61% of every bar the kit plays. Learn that one and the song is very nearly finished.
It is played on hi-hat, snare, high tom, floor tom, kick and hi-hat foot, counted in thirty-second notes. On its own it scores 62 out of 100 -- a step up -- and the thing that decides that is how much of it falls off the beat.
The whole song is 70 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 68 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 68, 81, 93 and 105 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 2-bar phrase on hi-hat, snare, high tom, floor tom, kick and hi-hat foot, in 4/4 at 105 BPM, counted in thirty-second notes. It is written out above, and it covers 61% of the bars the kit plays.
Bars 1-21, 38-56 and 73-82.
62 out of 100 on its own -- a step up. The song as a whole is 70 out of 100: demanding, mostly on the independence between the hands and the feet.