I work the French Empire list to be 68...
That rings a bell. I think your core force is a bit small.
Another way to think about it is compare your core list with the French Empire core. You have 3 good and 4 bad versus the French with 6 good. So you are effectively saying 4 bad = 3 good units. You can see in some other lists where good troops are switched to bad troops (French attack units in Empire v Liberation for instance). Generally the switch seems to be for more bad units than you have used.
I would add another 2nd rate unit to your core list.
You can do the same with cavalry. Compare your force with the French Light Cavalry support (2 Val, 2 Line). Would have thought your 3 cav unit support is way underpowered.
I would add a 4th cavalry unit, and then tinker with size and quality to get something that is historically valid but about equal in fighting power (= points) to French cavalry.
One thing to watch is the Berg lancers. The Nafziger numbers say they could be large. Large larcers are very good units - they can run over squares (and are absolute tigers in woods).
it unlikley that French of French allied cavalry particularly Confederation forces would be "large"
The dilemma is do you use an "average" historical formation or a specific historic formation. On average, yes the French units were small. But they were not always small.
The problem with CoR cavalry is that usually there were not that many serving together. So you get the suggested 3 small cavalry units for support. But if the standard French cavalry support option has 4 units, to play balance (and that is what an AB list is supposed to do) then a 3 unit support has to either be (a) better quality than the French or (b) larger units than the French. Neither makes a great deal of sense. I think you need at least 4 units - which was probably rare in practise.
That is why I think looking at a specific OOB can really help.
IX Corp in 1812 does provide a specific formation with Confederation of the Rhine infantry and cavalry in the same Corp. You can get strengths, and Nafziger shows that at the start of the campaign the Saxon and Berg cavalry regiments were both large in Lasalle terms (although their strength seemed to fall pretty quickly by the time they saw action). You get 4 cavalry units.
IX corp is probably unusual for the Confederation of the Rhine. But it does have the advantage of meaning you can provide a balanced AB army list - which was the original post was about - that is, by definition, historical.
Cam