It'll sound a bit odd but I have gut hunch that Ramon won't be back or at least for quite some time. Surgically repaired knee that he couldn't even bend down into a crouch, not a good thing even if he comes back. I'd look to finding a guy who can come in right away and platoon with Hanigan and preferably spanish speaking with a bat from the left side. Looking around Miguel Montero of the D-Backs is who I'd target and not look back. If Ramon comes back at all he'll likely limp thru the rest of the season.
If you could make a swap for a better IF guy who can pick up the slack at 3B and SS (occ. at 2B) it would help though I can't see the Reds pursuing it thanks to Cairo and Janish's 1st half. But Alberto Callaspo is a good fit IMO for just this if they decided to look for one. Both guys give us more versatility as both hit from the left side (Callaspo a Switch hitter).
With Harang and Bailey due back at some point unless they deal someone I can't see them pursuing any starting pitching, Walt has practically said as much since Lee came off the market.
They may still go after a relief arm though at this juncture they will likely just wait it out until close to the deadline to see if they can sort it out with what they have internally.
Bottom line short of an unforeseen injury I doubt they make a move unless it's a backup positional player or a relief arm.