I'm completely comfortable in a short series when we throw Beckett and Lester 4 times. And I'm comfortable in a 7 game series when we throw Beckett/Lester/Bedard/Aceves-Buchholz piggyback.
Or hell, even throw Aceves-Buchholz piggybacked as your #3.
You can't put into words how important Buchholz would be to this team out of the bullpen. If he can come back, we can slide him into the 7th inning role. When we use him in the 7th inning, we can use Aceves as our #3 starter and Bedard as our #4 starter in a long series. You can pair up Buchholz with Aceves and let Buch go 2 IP, and make a hell of a starter out of that combo.