Problem selection:
For this drill, use board or spray wall climbs at RPE4-6 or as specified in your plan. You should feel building fatigue, but not get so pumped that you start failing. You should climb for 30 seconds and then drop and rest for the next 30. Use an interval timer. You do not need to complete problems.
It will help to either have the problems memorized, or have a friend helping by changing board problems or pointing out holds.
To bring problem difficulty down to the right RPE, use any feet. I highly recommend this strategy. To make sure you climb for 30 seconds, traversing into the start holds is preferred to downclimbing.
Climbing:
Pick 2-3 problems, start a 1 minute interval timer and repeat them in order on the minute. Your plan will specify the number of reps and sets. Rest 6 minutes between sets unless otherwise specified. For instance, 2 sets of 6 reps would look like this:
Climb problem A, B, C, A, B, C starting each problem on the minute. Rest 6 minutes.
Climb problem A, B, C, A, B, C starting each problem on the minute.
Focus:
Climb economically and smoothly. You will get pumped.
Combination:
This is an endurance session and can be combined with any session. Perform after warming up and climbing, and before any resistance training / conditioning.