Exploring The Harbingers

Makinoji

https://youtu.be/Nu7cGnn94d0

Ravudha

Definitely sounds like the harbingers represent the forces of the banished gods, coming back for revenge on Verra.

Having the setup of Gods -> Ancients -> monsters gives a solid template for setting up raids and lore - it could branch out into additional enemy forces from other worlds since the banished were away for so long doing who knows what, epic monsters the banished raised, and other beings/factions related to the essence. Variety would be good.