Recently installed Tweakmod and started a game as the Amurites (mostly to test out the Arcane Mastery mod). Note that this was before you just made major changes to the Amurites. I really liked the Circle of Gaelan ritual. It gives the Amurites some protection in the early game when they need it the most. Although I am little worried that this, coupled with your more recent changes, will eliminate the much needed balance to the Amurites of being weak early game and strong late game...
Suggestions for Overcouncil Resolutions:
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Promote Cultural Understanding:Adds the diverse trait to all civilizations that follow the Overcouncil.
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The Spirit of the Law:+1

from Courthouse for all civilizations that follow the Overcouncil.
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Spread the Light of Lugus: 5% chance of Empyrean spreading in all cities (regardless of whether they are in the Overcouncil).
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Banning of the Dark Arts: Outlaw Shadow, Death, and Entropy mana. (I don't know why you took this out. It was thematically appropriate and a nice balance to being able to join the OC. If it was slightly annoying, that is fine. Defy the resolution and create an exciting twist in the story for this game).
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Illuminate the World: Share maps with all members of the Overcouncil.
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Rule by Example: Reduce maintence cost in all cities by 10%. This would go away if you left the Overcouncil.
Suggestions for Elohim:
I am glad you are tackling the Elohim. While I have never played FF, I like a lot of the changes I have heard they made to them. First and foremost is giving the Elohim Spiritual and taking away Tolerant. I
hate Tolerant for the Elohim. They used to by my favorite civ, where I could turtle away and create a peaceful kingdom (and enjoy my builder style of play). Now their greatest mechanic involves war and capturing cities. I rarely play them anymore.
Other than that, I always pictured the Elohim as
the definiative Good civ: wise, compassionate, and doing their best to prevent the end of the world. I hope any changes reflect that.