it's all about the good cooperation between your cavalry stacks.
Hit, let them follow, strike, run, hit, strike, concentrate forces, strike, hit, follow, hit and destroy.
Somehow that way, I think you know already how to beat the french stacks of mega-doom.
The idea of making all divisions equal in strength should just make it easier to control them, since putting accidentally 1k division defend alone is not as good as 1 army with 5k troops.
You can always unite the stacks and later split into smaller ones.
Anyways, you are going to win France just due to that power which lies between your ears.
-Hit and run
-fight always in favourable terrain
-try always to be the defending force
-never let the enemy rest
-fight united, defend united, win united