When it comes to editing tags I usually wait for RoflcoptrException to be in the chat and I ping him directly. In case I know he's on holiday I open a meta thread every time I see a tag that should be renamed. I'm not sure this is the most efficient workflow, for a number of reasons.
How about compiling a list of tags to be renamed to make it easier for the mods?
Below is a community wiki answer to be edited by adding the tags to be renamed and the edit status. The mods can then monitor the post for edits and act accordingly.