Shaq came on the current road trip with one thing in mind--suiting up in Miami. He practiced today, and assuming no further re-injury he'll go tomorrow. You can count on that.
We have advantages at the 1 and 5 against the Heat and will win or lose depending on how much we can exploit those advantages. In the end, it'll be a matter of how much Shaq can give us (probably no more than 15-20 minutes), how aggressive KG is in looking for his shot (he absolutely cannot pass up shots), and how effective Glen can be in crunch time.
If I'm Doc, I'm pulling JO aside and telling him to get healthy. With a swollen knee, something is obviously wrong and since JO ain't the type to play well with the pain the best move for all parties is to rest him until he's pain-free.
Based on Doc's history and treatment of rookies, I doubt Semih gets much time on Thursday unless there's major foul trouble or both O'Neal's are unavailable. If I had to guess right now, both O'Neal's will dress, Shaq will start, and JO will limp around ineffectively for maybe 10 minutes, with Baby filling in the rest of the time. Doc will probably limit his rotation (meaning no Wafer) and probably be forced to go small at some point due to a lack of bigs.