I did rounds of the following, increasing the weight for the dumbell snatch and the height of the box almost each round until the end and I used that for 2-3 rounds.
35 lbs, 40, 45, 50, 55, 60, 60, 60
I was doing about 10-12 rebounding reps for the box jumps. I got probably about 32-34" for the box jumps, but stopped with increasing the height and the weight to work on fast reps and keep good solid form. each round was a bit taxing but not too bad. It was not a winded workout, but my legs were tired for sure.