Heroes 5.5 WarGame Edition - Tactical Edition.

5) demons, parasites, imps

Perhaps, instead of parasites, they should be called lemurs?

9) engineers, arsonists, saboteurs

I think it would be better to make saboteurs out of the saboteurs, and sappers out of the arsonists. In addition, I think it would be better to swap the names of the overlords and the devils. After all, it would be more logical if the latter summoned ifrits, and not the former.

Added 2 minutes later

I don't quite understand why cling to the idea of Thors. And, in my opinion, it sounds clumsy, and I personally wouldn't want to repeat the mistakes of others by filling the universe with awkward real-world names. But, whatever the case, the last word is up to the mod author.

I agree. By the way, if the Aesir don't work, what's wrong with the Thurses? Unlike the Jotunn, they are not tied to cold, and they can be adapted to any element. There are also fire giants. And even sea giants. And, as a meaningful replacement for Thor, they are very good for this reason as well:

Thurses (Old Norse: þursar, English: thurs) are giants in Germanic and Norse mythology, most often humanoid. The rune Thurisaz is associated with Thor and his Hammer, because Thor is the protector against the Thurses. Thurisaz is a crushing weapon.