From everything I've read about Age of Wonders 4, Triumph peaked with Age of Wonders: Planetfall. But great as Planetfall is, one of the little details I miss greatly from AoW 3 is the terraforming mechanics, where you reshape the land hex-by-hex into your species' preferred climate to get various bonuses.
Enter Revival: Recolonization, a post-AI-rebellion-apocalypse 4X that's all about terraforming the broken land, hex-by-hex:
Apparently it's a spiritual sequel to an old phone 4X called "Revial," by the original devs, if that name rings a bell for any of you.