The beat the song is built on is one bar, played through bars 7-8, 11-12 and 15-18, and 17 more places -- 35.3% of every bar the kit plays. Learn that one and most of the song is already under your hands.
It is played on snare, floor tom and kick, counted in thirty-second notes. On its own it scores 50 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 65 out of 100, so the beat is not the hard part: what costs you is everything around it, the joins and the fills.
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 3 rungs, each with a tempo to reach and a gate to pass before the next.
Tempo goes 66, 77 and 88 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 snare, floor tom and kick, in 4/4 at 88 BPM, counted in thirty-second notes. It is written out above, and it covers 35.3% of the bars the kit plays.
Bars 7-8, 11-12, 15-18 and 21-24, and 16 more places. The time is kept on the silence to start with, and it changes 10 times over the song.
50 out of 100 on its own -- a step up. The song as a whole is 65 out of 100: demanding, mostly on how much of it falls off the beat.