No, bad idea.
RJ needs to start, and Manu is better when coming off the Bench. I am surprised at how many people think Manu can start. We will have Tony, TD, RJ and Mason all in the Starting Lineup, and all of them can score. It's not good to have all your offensive weapons play and rest at the same time.
Manu works better by providing a huge spark off the Bench. Manu and Finley will lead the 2nd Unit, and Hill and Blair will follow. Our entire Team has a great mixture of veterans (Timmy, Tony, Manu, McDyess), young guys (Hill, Blair, Mahinmi, Hairston) and guys in their prime (RJ, Tony again, Mason and Bonner).