For example, EU vs RU:
Over in the N. Atlantic you could have a bunch in relative info like; how long it takes to get into the Indian (from both territories) and the aproximate game time. You could have the cities marked (or rather the area they are in) with "subs" or "bombers" as the caption to help you divide up the territory. Different positions and attack angles could be pre-marked. This is done in most high level matches anyway with the WB. The best part is, you might be able to see exactly how an enemy is coming at you once you make contact.
On other thing that could be helpful... Somwhere in the city name, place a number indicating how many nukes it takes to zero it out (default). In really intense games, I would open up a spreadsheet and do a quick list of the most common populations and have it show exactly how many nuke hits it would take to get 0.0, 0.1, 0.2. [mostly against (MOR)]. This made bomber runs much more effective (silos too).







