Go have a discussion with the coach of your choice, and ask him or her if the best way to teach the elementary team is by having them skirmish the high school starters, or if much learning would happen if those high school starters skirmished a college or pro team. I guarantee the answer is that no learning would take place. It's why literally every sport on the planet is divided into leagues...SBMM, if you will. Plus, SBMM has enough built-in latitude, especially now, that there are plenty of opportunities to play better people and learn without being overwhelmed.