Post your tier list.
https://tiermaker.com/create/battle-realms-units-539648

This is mine based on the "original" experience with the latest patch and how easy the game is to win with said units in singleplayer

S - you always want to have in your army
F - you almost never want to have this in your army because it's an active waste of resources (i.e. Ronin, whose most permanent value in the original was the debuff from dying)

No particular meaning in the horizontal order, it's maybe alphabetical/based on the picture filenames in the sorter.