Nothing's worse than writing a long, well-thought-out post, then hitting the wrong button and losing it.
Here's the short version: unless you're going to run a platoon rotation, why call it the "second unit"? They don't play as a second unit.
Really, what you have is 10 guys that play together, and the first and second units are interchangable.
JO and Ron will both play 36mpg this year, which means that they'll be on the floor together for at least half the game.