Ended up getting a little carried away reading the army guidelines, so here is my proposed unit list/cost for the 300 point Rooskies:
10 - Kutusov
5 - Kutnisov
110 - Infantry (10 units)
64 - Guards, Grenadiers (4 units)
12 - Militia (2 units)
30 - Guard Cav (2 units)
30 - Cavalry (3 units)
16 - Cossacks (4 units)
9 - Heavy Arty (massed in battalion)
6 - Foot Arty (massed in battalion)
6 - Foot Arty (for attachment by battery, 3 batteries)
Total Cost 298
Formation
1st Corps - Kutnisov, 1 Heavy Arty, 2 Infantry, 1 Guard/Gren, 1 Cav, 1 Militia
2nd Corps - 1 Foot Arty, 2 Infantry, 1 Guard/Gren, 1 Cav, 1 Militia
3rd Corps - 4 Infantry (w/ 1 attached battery), 1 Cav
4th Corps - 2 Guard Cav, 4 Cossacks
5th Corps - 2 Infantry (w/ 2 attached batteries), 2 Guard/Gren
I may end up breaking out some of the cav for Scouting per the Scharnhorst campaign rules. Of course, let me know if you see any issue with this. The Russians are a little odd with their small Corps, I'm stuck with 3-6 Corps of max size 6 units.
Edit: swapped out an infantry for Kutusov. We will see how much of a pain (or not) being immobile is.