Your team is pretty good, I would say to pick up someone like Jed Lowrie or Brandon Crawford(if either is available) as either a starter or a backup to Simmons. Gyorko could also help at either 2nd or 3rd, but overall a good team. Please look at my post "Team Needs?" and feel free to comment.
I would drop profar and frankilin hills coming back soon solves your 2nd base problem and I would pick up a guy like lucoy is u can to give u more flex and another of like Soriano or morse depends on whos available and can drop them when hill comes back