Upper_Krust
Legend
This seems off to me. Officially in 5e Tiamat is a lesser god and her official stats were CR 30. That has changed since Fizban's came out as her avatar in that book is a CR 30 mythic monster (think 2 CR 30 monsters). Since I assume a god is stronger than its avatar, then Tiamat, a lesser god, must be stronger than a CR 30 mythic monster. Not sure how far along you are with your book, but I think you need to revise your CRs up.
That list was from a while ago.
Its currently:
Demi: CR 21-24
Lesser: CR 25-28
Intermediate: CR 29-32
Greater: CR 33-36
All gods have mythic forms accessible on their home planes.
I should also mention my gods & monsters are MUCH tougher for their CR's and you would need to increase them by 25% before they even come close to their weaker WotC counterparts.
Fizban's high level monsters were weak sauce compared to what I'm cooking up. That Fizban's Tiamat would be about CR 23 in my book.
So if I was to detail Zeus he would be CR 36, effectively equivalent to a WotC CR of 44 AND have mythic form (on his home plane), plus he'll be casting epic spells.
When I start posting previews of these monsters and you see the damage they are dealing players will s*** a proverbial brick, if you'll pardon my harsh language.
Don't worry, I have this epic stuff covered amigo.
