Go for the WC, the current measure of a respectable season. The team does not have three superior starters, starters like Jordan Zimmermann, Stephen Strasburg, Max Scherzer, plus Fister, Gio, or that year of Corbin. That is a WS pitching staff. OK, but win enough to take a step forward.
The Nats have enough minor league talent to return a good reliever. Maybe not another team's closer, but their 8th inning guy. Right now, Andrew Pinckney is pretty good, but stuck behind the four OF in the majors. Glasser, Seaver King (though injured), Lipscomb, YoYo, and Abimilec are all worth something, but looking up at good regulars plus Tena and Vivas. That's just Rochester.
Get a good reliever, someone like Beeter, and a useful guy, like Eddie Yean. That helps the bullpen.
With Irvin back, the rotation is better.