If you are optimizing, I would expect you would need to use the solver tool. The problem with that is even if you find the perfect 5 man units, there is no guarantee the SIM would play them that way. I've envisioned building teams with high and low usage guys across all 5 positions, where, for example, when a high usage PG is subbed for a low usage one, a high usage C would be subbed in for a low usage C at the same time. But the SIM doesn't have that customization, so you'll end up with at least a few low usage with low usage minutes and get killed.