I have a similiar problem, except my receivers are Roddy White, Reggie Wayne, Eric Decker, Marques Colston and Miles Austin. Pretty much set on not playing Austin, and I keep sqwitching between the other 4. Think Decker is my one definite because he's been hot and Haden will probably be on Thomas.
As for your issue, I would definitely start Calvin Johnson and Mike Wallace, as the Pittsburgh/Bengals game has a lot of importance. As for the 3rd, I'd go with either Decker or Wayne. Best of luck to ya!!