If the Celts intend to use MLE and S&T for Terry and another wing, I'd like to see them bring in Darko as a 3rd string center or platoon guy with Sullinger. I think this system would help him, and he'd be useful when we play a big team.
In terms of platoon guy - I'm thinking with Sullinger coming in against shorter centers and/or for some low post offense, and Darko only against other teams with physical centers.