Will have to give Georgia a miss. It's simply too far. For the Montenegro game, I would look at doing a regional tour with most time spent in Greece, and then split the rest of the trip between Skopje and Dubrovnik, with going to Montenegro just for the game itself. There may not be much to do in Montenegro apart from go to the game, and could be an "in and out" job.
Anyway, it's still January. Plenty of time to look at other options yet. :)