I dont have my book at work so I'm not sure if scouts can take a rhino. If they can, drop the sternguard down and get a rhino with the scouts to allow your sterns to ride in it as a large squad or combat squad them.
5 stern, pedro
5 stern, lib
10 stern, scout rhino, razorback. Combat squad 5 and 5 or a group of 10 in rhino and go twin las as fire support back with the scouts.