So we typically have 6 photog in a 2 hour shot session. Typical 4 rooms, with different back grounds and light settings. You get about 5 shots per rotation. No touching. So you could give the model instruction and work with her within limit. Because the next shooter is waiting there.
It was not very comfortable repeating someone else's posting. And model sometime could not give me exactly the same. After 3 ~ 4 tries, you just shot what model is giving you.
The next model, I was told, is very experieced.
One thing I learnt for sure. Under these studio conditions, your camera equipment is far far less important than your own head. Some one with a d40 and a 18-55 mm VR could turn out much better pictrures than those with a D3x with 135mm DC or 85mm 1.4 or 200mm F2.