You said he can get through 3 innings and blows up in the 4th, since you seem to think it's like clockwork, we could easily plan on him going 3 innings and then fill in with May, Drohan, whoever to get to Ashby/Uribe/Megill.
Again, you give Miz and Henderson a chance to work out of trouble. If Gasser, May, Drohan or whoever else starts and gets into trouble, you pull them and go with your bullpen, because, again, for the last time, with so many built in off days your relievers get a lot more rest than they do in the regular season and you can use them sooner and in more games.