Heroes 5.5 WarGame Edition - Tactical Edition.

In my opinion, a griffin cannot be weaker than a Knight, because horses are prey for griffins. In WGE, griffins are tier 5, and Knights are tier 6, but this is just formal; in reality, they are equal in strength. Moreover, griffins are equal not to ordinary, but to elite cavalry, on elite super-heavy horses. That is, it is necessary to bring the Knights up to the level of griffins, and not vice versa.

Nargott in WGE reconsiders the game mechanics as a whole. In my opinion, we can go much further than minimal changes here.

Isn't it explicitly stated anywhere that Ashan's griffins are canonically smaller than lions? Ubisoft is extremely stingy with specifying exact sizes in monster descriptions, possibly because there are many inconsistencies with common sense.