It wouldn't count for overall rank and would only be informative.
Taking into account (not sure yet about calculation) both army size (minus mercenaries?) and UP (raw only, would change too much if we considered planets -can be stolen/upgraded in different aspects- and officers UP bonus -due to 10% to 30% options-).
Would be a great way to know where you stand without giving it away completely (not taking into account mercenaries on the one hand, UP planets/officers on the other hand).
Thus, it wouldn't be about who has the biggest "total"


