Should I do one of these fantasy baseball trades?

No no no, don't listen to them ^^. Trade A would be great for you, although you give up an elite pitcher in Lester, you still have the best pitcher in the game, Halladay. And Anderson isn't bad either, and when Crawford starts hitting like he normally does, he's going to be great for you team. I would not do the second trade because Halladay is a lot to give up, and your pitching isn't good enough to do that trade. But i would try ad make a trade for a better shortstop, or another great pitcher, then do the second trade.