How do you split 100 wall balls without falling apart?

Wall balls come last, after 7 km of running and everything else, and race data says they're where most people lose the most time. I keep seeing different strategies: 10 sets of 10, 25-20-20-15-10-10, unbroken until failure then 5s, or straight into 5s from the first rep. What's your split, and what changed when you started training it fatigued instead of fresh?