I think you could still use a scale system to work it out it would just need more variables. Look at football player stats I can’t tell you what makes that magic number but they seem to have a good system down for putting one player vs another.
I know that souds kinda stupic if US = 111 it has to beat Afganistan at 82.
I would think it would have to be more complex then that like when I worked in supply in the Army every thing had a “NSN” National Stock Number it broke down like this:
1005-01-231-1234
I made this one up b/c I couldn’t remember any without looking. 1005 = small arms less than 40mm, 01 = country code 00, 01 are made in US, 231 = transportation code it can be move by 1) land, a) truck, b) rail, 2) sea, 3) air. Lastly 1234 was the number used to ID that item so for sake of arument say its an M-16. Also NSN’s are not limited to numbers they also use letters.
you could use this system to put econonic, political probability, military size, and as many other variables as you want.
I think some mathmatician could devise a system that was 90% acurate lets say this would make it a probable answer not an absolute. When you read it, it would look like binary code.
The hardest think to input would be public opinion I think. When we went to Iraq the US was in the 80 percential about going look at in now.
What do you think about that?