Fix manoah, add pen piece, add a bench bat to crush lefties. That's about that can be done with this roster given it's remarkably good health.
A slightly less likely scenario would be that Manoah gets fixed AND Ryu AND Green come back, which would shift Kikuchi to the pen, trade or DFA Cimber, Hatch or whomever else they need to to make roster room. There's really not a lot of big moves that can even be made with this roster. It's tweaking, or gutting, and they wont be gutting.