In my opinion, your heavy OF and RP.
You need MI, with a SB component, and SP.
Does Hafner have 1b elgibility in your league? That would allow you to trade Chad Tracy.
I might have to be a little patient. Let the seaon start and hope one of your outfielders, Tracy, Hermida, Baldelli, or Gonzo gets off to a quick start. Of the 4, I would trade Gonzo. You know what he'll produce roughly. The other three have upside.
I think Valverde is the least secure of your RP that I might deal.
Could pair one of these guys with one of your SP, and try to upgradde your SP.
Otherwise, try to deal OF straight up for MI who will get at least 20 SB this year.