I actually don't like any of the ones you're looking at picking up. Lester is your ticket, but your staff could use something more. I'm a huge Ervin Santana fan, I would try and trade for him. Maybe someone really wants Wandy and thinks he can bring it back? I suggest putting Wandy on your trading block and seeing what kind of offers you get. If you really want to roll the dice on De La Rosa or Latos, I wouldn't be against dropping Lilly. All three are unreliable and you're just flipping a three sided coin, but if you want to make a move then do it. Give us your offense and let's see if you're willing to trade anyone.
If you don't mind helping me out, here's my link. viewtopic.php?t=413144