One big time reliever, hopefully a closer type who can is willing to be used more flexibly. Maybe a second bullpen piece (righty) if Kelley is done. I think the rest of the bullpen is set with Treinen, Solis, Perez, Grace, and one of the 4 arms at the top of the organization (Lopez, Cole, Ross, Giolito). One of the latter 4 will be in the rotation, another in AAA, and the 4th is trade bait.
Catcher is obvious, and either a CF or SS.
I think the rotation is somewhat set with Scherzer and Roark, Gio (unless another lefty is acquired), and one of the 4 top organization arms (Ross or Lopez, probably). This is predicated on Strasburg being healthy, which I think is a question mark. The thing is, they need a healthy #4-5 guy who can eat innings, maybe with a slightly worse than average ERA. That could be enough if Strasburg is marginal.