@redrum One more thought based on the last round from our game. Perhaps simplifying my request with a hotkey to max possible attack, including air. For example, if I had looked at the map more closely I would have realized that you have an advantage with max possible attack in the battle of SZ127 and you brought your air Hupeh, etc. If I had realized I would not have move to SZ127.
Similar to the hotkey "f" which allows you to see units with movement left, one hotkey could show max possible attack and highlight units that could attack a certain territory. Likely this feature would get more use on complex maps such as we discussed.
With this being a "perfect information" map I think this feature could simplify the decision making process for the player without a downside as there is no "fog of war" or other unknown variables.