The sheer size........ mindboggling.
Concerning command-unit ratios.
For normal games with the dwarfs the ratios are prety simpel
1k - general and runesmith
2k - add 1 hero
3k - and 1 hero and 1 runsmith
After 3k I would guesitate that you will need 1 more runesmith at the 6k mark, and after the 6k mark you will need 2 heroes per K points.
Remember that you are no longer buying a general, which will free up points, but also that the ration on units vs brigades will start to totter, when creating things like a Grand Battery....
extrapolation
3K - add 1 her
5k - add 1 hero
6k - add 1 runesmith and 1 hero
7k - add 2 heroes
8k - add 2 heroes
9k - add 2 heroes (potentialy add more more runesmith, but I have trouble visualizeing the coverage ranges of an army this size...
10k - add 2 more heroes