Weighted vest and rucksack rotation.
9 guys chose a number between 1 and 9
#1 would wear weighted vest (floor to ceiling squats)
#2 would wear rucksack (diamond, standard, wide, girl merkins to failure in that order)
#3 through #9 would do the workout that the weighted vest chose.
#1 would choose an excercise that the #3-9 group had to do 10 reps of and then choose for them to do 11 hills or sprints.
After that round, #2 put the weighted vest on and #3 put the rucksack on. Now the vest (#2) chose a workout of 20 reps and 12 hills or sprints while the rucksack did the pushups and the weighted vest did the squats.
This rotation continued. 30/13, 40/14, 50/15…etc.