Assuming the Shaq signing happens, it'll depending on if it's just a straight signing at the min or a S&T that also brings back one of Shaq's Cleveland teammates. There's room for one more wing-type.
Rondo / Nate
Ray / Wafer / Avery
Pierce / Quis
KG / Baby / 'Gody
JO / Perk / Shaq
That's thirteen spots that seem to me to be pretty much locked down. I'm be shocked if 'Gody doesn't make the squad, not with how he looked in Summer League and how they've been saying lots of good things about him. He's the new Scal, or the new Ryan Gomes, he'll get at least one season to prove he belongs in the NBA.
Figure they'll leave one roster spot open for Semih, Gafney, and Lafayette to fight over. That's fourteen.
Figure 'Sheed will be gone one way or the other, either traded for Shaq or retired. His roster spot, I could see them using on another wing. Could be a guy like Moon, if Shaq is a S&T. Could be a guy like West, although I'd think you'd probably want more of a true small forward behind Pierce (especially since Quis is always an injury concern).