Rystic
Turtle Wizard
What if, in addition to bonuses for features they own, the Elohim got (comparatively minor) maluses for features owned by evil civs? Maybe +2% maintenance? I don't know what would be balanced. But this would encourage selective warmongering against evil civs, specifically targeting those who threaten unique features--which does seem lore-appropriate to me. I know a lot of people think of the Elohim as pacifists, but various pedia entries pretty clearly show them as one of the most effective military forces fighting evil.
My ultimate plan for the Elohim is to make them not just defend unique features, but the world itself. Like making Hell Terrain spread slower if the Elohim control more Unique Features, and stop spreading altogether if they control all of them (even in Infernal territory). Another idea I had was making their cultural expansions go further, like the Kuriotates used to.
As far as penalties, the Elohim are known for fighting evil, so I was going to make their War Weariness when they kill a unit from a Good Empire.