Thinking about temples and some minor worship aspects for those who follow the Way of Flame, because it's a neat thing to think about.
The Way of Flame is veneration of the sacred forge of Solus Prime, and the belief that all Camiens are descendants of her sacred spark. We don't get to learn much of the religion overall, but there's a distinct focus on creation and fire as a creative force, not a destructive one.
I get the feeling that the Way of Flame utilizes massive open spaces with very little natural light- most of the temples are illuminated not using artificial light, either, but instead hundreds of torches, maintained by the temple priests.
Many blacksmiths tend to work directly within the temples, as their job directly relates to the creation of new life.
Only the Mistress of Flame would be able to cross the threshold to the center circle, lined with "eternal" flames in a circle on the floor, with a central forge serving as the fire that feeds all the torches in the temple proper.
Adherents of the Way of Flame come to the temple on holy days to have a small torch lit to take home, often to light small household shrines for certain forms of worship.
The temples, I think, are also where cityspeakers may reside. The cities themselves, the metrotitans, are likely considered minor deities, and as cityspeakers come online with the innate gift of telepathy that allows them to learn to touch the minds of the giants and understand their ancient dialect, they're considered members of the priesthood.
Caminus has one central temple in the middle of the city, though there is one built during the reconstruction on Cybertron, which is where Windblade eventually comes to reside. While she does not take on the full title, she has the same role and duties here as the Mistress of Flame herself.