You should get teamspeak!
Apart from that, I support this suggestion.
A current solution could be getting some auto typer software and try binding some phrases with that.
The downside to this is that you will most probably still have to stand still while "typing", else your input might interfere. At least it should shorten the time spent typing and thus lengthen your potential lifespan.
AutoHotkey is pretty good, and I've used a bit with minecraft, but I can't get it to work with RWR. Might be some window focus problem or something like that. I'll get back to you if I figure it out.
