The method, again: After getting basically familiar with the patterns by playing them several times individually, begin combining patterns as follows, playing each lettered pattern 4x, 2x, and 1x:
AB, AC AD... BC, BD... CD...
Do that across all the pages, so you'll be combining all patterns from the same numbered row on all three pages. Not a small assignment. It wouldn't be a bad idea to play through each page by the vertical column, just playing the patterns 4x each. No need to do combinations when working that way.
Our relation to the original patterns is getting slightly less obvious, so here's what's going on: Column A is a groove with a baiao-style hihat rhythm; column B has the cymbal in unison with the bass drum on beat 1, in unison with the snare drum on beat 2; column C has open hihat on single bass drum notes, and on the second bass drum note of any doubles; column D is alternating sixtuplets, playing cymbal accents in unison with the bass drum— this will be harder to do at faster tempos, so I would cut that from the routine rather than let it prevent me from doing the system fast.
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