I'd be ok with them going with Sweeney/Aviles/Mcdonald in RF. There are not any real great options or fits currently available IMO. They could go with those 3, then see how Kalish is doing and/or see who is available at the TDL.
After that I think they need to look into SP depth. I take it right now Miller, Tazawa and Doubront are the pitchers in the minors for depth currently(I admit I'm a little behind, just really getting back into things since the end of the season). I think they should sign Harden and Webb both to one year deals(possibly minor league) worth 1M base +500K-1M in incentives. Let them battle it out for the 5th spot. If Bard can't handle starting the other one can jump in. Those 5 guys should provide enough depth until June-July when they can re-evaluate the SP trade market. The only trade that makes sense right now is Garza. But I'm torn about giving up the prospects. One side of me thinks he be a great 3-4 for this win now team. And giving up prospects who are probably blocked wouldn't be so bad.
I would rather they sign the low risk guys for short money and hold on to the prospects, let the Mariners get a taste of what life is now gonna be like with the Rangers and Mariners becoming NY and Boston west and try and pry Pineda or Felix away from their cold dead fingers Maybe not Felix, but if Seattle misses out on Fielder they might listen. If they sign him, no chance either one gets moved.