20 Cleans (power or full) at each weight in less than 15 minutes:
M: 95-115-135-155
W: 65-85-105-125
Then: Pullup Pyramid:
1 in the first minute
2 in the second minute
3 in the third minute
…continuing as long as possible.
Switching from a false grip to a regular grip in the muscle-up can save you several seconds' setup time. Let's get on it as part of your muscle-up evolution.