There are many great ways to use Tim Wakefield. The Red Sox have been lucky to have him all these years.
Here's one new way that just occurred to me (apologies to anyone else who has already suggested this). Have him pitch to the first 9 batters only, and do this every two or three games. Then bring in the normal starter in relief. This could be a great way to throw off every hitter's timing and swing for the rest of the game.