The lob is great for lower level doubles. Lob it DTL over the net guy. Even if the server and get to the ball, the net guy is usually not quick enough to get out of the way. So you can either hit a hard CC to catch him or, the server will give a bad cc or short lob for you to finish it.
Keep in mind I am talking about a ts lob return, not some lame moonball return unless it is a 100mph serve.