I was going to make my own thread, but maybe I'll just add on to this, hopefully this isn't too much of a hijack.
I recently purchased the ultimate edition and am primarily looking forward to the sandbox play while finding the hardest level of game play available (looking to play on "tough" difficulty). I've been reading all over trying to figure out which game is the best from an AI perspective, but get mixed feedback.
Dark Avatar was still a bit loose on the trade AI.
TOA has problems with tech scaling that screws up the AI and seems to have some other tech tree related holes?
The original seems to not get many AI complaints, but lacks the updates that the expansions brought.
So from a challenge perspective, any thoughts on which version is best?