Great work on the Muscle Ups!  I have spent years avoiding putting these in workouts regularly.  I was wrong!  That rarely happens, medications so enjoy it.  Use the subs, medical the simplest, easiest one possible until you are ready to move up.  

Workout of the Day

Strength/Skill, The Cube, Week 2 of 9

Deadlift

5 sets of 2, 80% of 1RM

Conditioning

3 RFT

21-15-9

Sumo Deadlift High Pull 75/55

Box Jump 24/20

15 minute cap

That is 3 rounds, so you do 21 of each, then 15 of each.  When you complete the round of 9, you start again at 21 (your second round), then 15, then 9, then you begin your third and final round.  That’s 270 reps total, 135 of each movement.  If you complete it in the time cap, record your time.  If you run into the cap, give the number of reps completed.