I'm evaluating to buy Dom3

[Tuidjy]

I would call the AI 'decent' at best. But place yourself in the middle of
six aggressive, impossible AIs, and you will have a good game even if you
use every dirty trick in the book. And trust me on that one, after you
play the AI for a month or two, you will adventure on-line, and there
you will be lost forever... MUHAHAHA! ahem.

By the way, Dominions II was the second game that I played on-line. The first
one was Dark Reign, a looooong time ago. I considered myself a single player
before I picked up Dominions II, and ended up playing it for an year or so
to the exclusion of everything else... until I left when the player from whom I
learned the most turned out to be cheating.