Hey, just a suggestion, as this thread has already begun to spiral, and doesn't seem to be headed anywhere.
Rather than score, since Aargh! claims they want to fight people with similar military capacity, we base war range on military capacity, which is calculated from the number of military improvements you currently have(which can be exploited, but so can any other system), and throw infra out the window in regards to war.
This is purely hypothetical atm, and I haven't really looked at the numbers yet.