I've played 10 Chaos Omniscient Dark Elves before and I would agree with JOMT that it's probably not the most efficient way to use Red/Omniscient power pumping. The problem is a lack of synergy - to really take advantage of Dark Elf power production you want to get high-pop cities as quickly as possible, which means Life for pop growth and Nature for max pop.
Now, I will say that 10COmDE was probably the most fun game I've ever played, because yeah once you hit midgame and your cities are getting to their pop cap your power production is just absurd, and that's even before taking volcanoes into account (I also got lucky and picked up Archmage, Specialist, and an 11th Chaos book in ruins, which didn't hurt). But I think someone who can get lots of power buildings up quickly (Klackons, Halflings) can generally make better use of it, or rather make use of it at a more crucial time. Hmmm, I kinda want to try 10 Chaos Omni with High Men now. 15% discount on buildings, focus on getting all those power structures up ASAP and use summons as early force instead of normals. Could be good. Definitely would be fun. Who doesn't love the idea of fire-breathing Paladins?
Now, I will say that 10COmDE was probably the most fun game I've ever played, because yeah once you hit midgame and your cities are getting to their pop cap your power production is just absurd, and that's even before taking volcanoes into account (I also got lucky and picked up Archmage, Specialist, and an 11th Chaos book in ruins, which didn't hurt). But I think someone who can get lots of power buildings up quickly (Klackons, Halflings) can generally make better use of it, or rather make use of it at a more crucial time. Hmmm, I kinda want to try 10 Chaos Omni with High Men now. 15% discount on buildings, focus on getting all those power structures up ASAP and use summons as early force instead of normals. Could be good. Definitely would be fun. Who doesn't love the idea of fire-breathing Paladins?