I've had the same problem, I've been trying to learn Fermented Offal Discharge of the "Onset of Putrefication". The whole song so much hard as it is fast. As far as the tapping it's just 1 pattern but the tempo kicks up like crazy.
I've been working on it really slow, so my personal advice: try to find the most comfortable/efficient way to play it and take you're time because whats the point of learning a half-a$$'d version right?
And keep in mind Stephan Fimmers is a monster, so don't get discouraged.
Best of luck.
