Here's the thing about Simmons, though: if you want the BEST use out of him, you need to RUN. Dame doesn't like to run. I see Simmons as like the New Jersey Jason Kidd (who also couldn't shoot, although he still hit FTs) - you build the team around him and get out there and sprint.
In the incredibly unlikely event we do end up with him, I would try to sell him on the idea of being Manu Ginobili. His job is to come in off the bench and fuck shit up. Just take the game by the scruff of the neck - create havoc. But you would need an incredible coach to actually sell that to a guy taken #1 in the draft.
(I would also want to institute a Bob Kloppenburg (?) press defense. They take up a lot of energy, but they also make use of his considerable defensive talents, and they use those talents over 94 feet.)