[Wendigo]

Unless this changed from Dom I, for Ashen Ermor:

Dominion strength, presence of temple & world richness determine the numbers generated, presence of fortress determines quality.

In my little playing of Ashen Ermor I have not noticed any changes to the above, although the presence of unburied corpses & existence/lack of population seem to have some effects on soulless & ghouls summoning/reanimation.