One of the matters that still feel quite afloat to me is about how the fire ensemble would be assembled in believable manner. I’m really bothered by the notion of this story being basically a group of young heroes facing evil in a full-on tokusatsu style.
It isn’t much of a problem in the God or Hero stage, as for one they are the pantheon of gods against demons, so their characteristics are pretty straight forward like in greek mythology, with Hephaestus being the god of craft, Áine being the goddess of fertility (like Freyja), Vesta being the goddess of wisdom and order (pretty much Athena), Zhu Rong being the god of strength (like Thor), and Trygve being the god of protection (it could be like a god of war, but I don’t know any with an essence like his). The hero stage would basically be the typical RPG party (Zhu Rong would be the offensive tank, Trygve is the warrior defending the others, Hephaestus is the mage, Áine is the healer and Vesta is a summoner). It’s for the Human stage that it really gets complicated. Hell, everything is much trickier in the human stage.
Let me see, these would end up being like leaders. Vesta is pretty much a commandant and strategist. Hephaestus is the engineer and he commands projects. Trygve deals with some military roles while Zhu Rong would be the one responsible for resources like mining, construction and harvesting. Áine would be responsible for diplomatic and external relationships.
Or then, instead of then being actual people, these could be roles of power, like a moniker for the ministers of departments. Something like a tradition, like having all princess in the dynasty being called Zelda.
That is interesting for the bronze-layered aspect of the human stage, as it changes the notion of conflicts from the simple battles and fights and wars that happen in more, let me put it this way, primitive types of mythologies and narratives, towards more complex implications of politics and economy. This way, in human stage Ilium and Ersatz would pretty much be inspired by the conflicts of the Roman Empire and Germanic tribes, mainly by their late invasion of Rome and fall of the western empire.