With the sudden influx of good pitching from the Rangers' young starting pitching, the bullpen has become a bit more interesting.  If the Rangers keep Rogers and sign a free-agent starter (or signs two starters and lets Rogers go), the rotation looks like this:

Rogers/Young/Loe/Dominguez/Free Agent

Which leaves the following pool of players for the bullpen:

Mahay, Shouse, Benoit, RicRod, Cordero, Wilson, Regilio, Feldman, Wasdin, Almanzar (mid-season), Fransisco, and some useless retreads.

Long man/Spot Starter:  Benoit, RicRod, Wasdin
Middle relief: Regilio, Shouse, Mahay, Wilson
Setup: Feldman, Fransisco
Closer: Cordero

Those are the possible options.  It seems to me that the gaping hole is in lefty relievers - Shouse and Mahay have been pretty bad this year.

What kind of bullpen configuration would be most effective?