Easiest way would be to play it straight, e.g. for the 6.0-7.0-8.0 recruit a few each of 3.0, 3.5, 4.0 men and women and let them all stick to their "natural" levels. But if you wanted to get crazy you could also recruit 2.5s and/or 4.5s, and the 3.5 players on your team could play at any of the...