those poor AI countries unable to blob out of control because France is a big bully. If you're fighting defensive wars, I would suggest putting all your eggs in one basket and keeping your entire army handy in whatever denominations and distribution prevents taking attrition, then dogpiling any french stack with your entire army, preferably in a defensive battle if terrain is rough. In the meantime, get some military ideas of some sort that aren't aristocratic, the holy roman elephant can eventually flatten the big blue blob. If that doesn't work, well, then they blue you.