Nargott
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I haven't played it either, but I've read about it.
Here's how it is for the Haven faction:
Core units: pikemen, swordsmen, archers
Elite units: knights, priests
Champions: griffins, angels, and swordmasters
If you exclude swordmasters for those who like fairy tales, it's similar to Heroes of Might and Magic V, with griffins being ranked higher than knights.