A few more notes...

Knights of Solamnia would be capable of producing three types of heavy cavalry... Knights of the Crown, Knights of the Sword, and Knights of the Rose. These would translate roughly into the various Knightly Orders (Teutonics, Templars, etc.) but with progressive improvement.

Priests within Solamnic lands would be called "Clerists", after the spiritual branch of the Order of the Sword.

Being that few rulers employ mages directly, they would have to be hirable mercs at major population centers... I would suggest making them small artillery units, basically replacing the majority of gunpowder units.

I don't remember seeing any mob formations in MTW, but if possible, that's how goblins and ogres should act. I would think these would be mixed... Blode, Throtl, and Lemish all making use of all types... light cavalry worg riders, light infantry goblins, heavy infantry ogres, medium infantry hobgoblins etc. Blonde would have cheaper Ogre units, Throtl cheaper goblin units, and Lemish a fairly good balance.

Minotaurs are highly organized have have an immensely strong navy, balanced on the "good" side only by Ergoth. Silvanesti has already been overtaken by the Minotaurs in 420 PC, but one could make the starting date immediately following the War of Souls, thus putting the Knights of Solamnia in shambles, and the Silvanesti still in place just about to be invaded by Mithas/Kothas.

The few remaining dragon territories could be represented by dragon spawn units along with mercenary humans and some Dark Knights, but I don't think they're viable enough to worry about, nor do I think dragon spawn (or draconians) are reproducible.

Dark Knights priests would be Thorn Knights, Dark Knight artillery would be Skull Knights, heavy Cavalry would be Lily Knights. That's pretty simple.

Mages of High Sorcery are tough to replicate, but they should certainly be mercenaries.