Prep day -- If you plan on going 100% at the Open workout on Saturday perform this work instead of class.
1k Row @ 85%
Rest 3mins
4 rounds of:
2 Power Snatches (115/75)
4 DL
4 T2B
6 WB
8 BJ 24/20"
10 Air Squats
30 DU
Rest 2mins, perform 1min of Hamstring stretching in between rounds. These should be done at 75%.
For the workout make sure you break the T2B early and often, 3s or 5s, pick your plan from the beginning and stick to it. I would recommend all singles on the snatches so long as the bar bouncing on you is not a major issue. For the C&J I would recommend 75%, 82%, 90%-93% or so. Find numbers close to those you can easily get on the bar, if you need to squat clean it hit one extra rep below 75% to warm up the squat clean.
Warm up should be 30-35mins, with 10-15mins of that being dedicated to hitting your 82% number at least twice. Loosen the hamstrings up a ton, this is massively taxing on your posterior. Grip is the main factor and needs to be controlled.