Heroes 5.5 WarGame Edition - Tactical Edition.

In the fourth game, they were on the fourth level (or third? How should it be correctly indicated?), which is equivalent to the fifth or sixth level in other games of the series.

In the fourth game, unfortunately, even the humans above tier 2 were too overpowered, i.e., the same swordsman in full armor (crusader) was considered as strong as a flying predator, three times his mass, as if the armor somehow protects against fractures. But yes, formally, griffons corresponded to tier 5.

Well, I guess I agree here; if we're talking about griffons that aren't Ashan's, then yes, that's the case.

But is it explicitly stated anywhere that Ashan's griffons are canonically smaller than lions? Ubisoft is very stingy with specifying exact sizes in monster descriptions, perhaps because there are many inconsistencies with common sense.