It sounds like many people have tweaked things to try to improve their games tho. Would anyone be interested in a joint effort to create an improved AI by tweaking game file, AI interests in advancements, etc.?

At the very least I'm curious what tweaks & adjustments everyone feels has made their enemy AI better. Such as...

1>Switching carrier slot with battleship/destroyer - did that work? What about altering other units to make the AI better?

2>What government do you feel helps barbarians out the most (Civtweak allows you to change their government & give them gold)?

3>Enemy AI interest in Monarchy is only a 5 (4 for military minds) tied with the alphabet, leadership, & ironworking. Monarchy is HUGE, I feel an 8 is more appropriate. Your thoughts?

4>What other AI value changes for advancements (if any) have you done?

Making monarchy a higher AI priority will 'probably' not help - they won't use the damn thing! I frequently gift Monarchy and Republic to all and sundry only to find that they just love to stay as despots!

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Scouse Git[1]

In my tests (on Civ2:Gold Diety), giving monarchy to the enemy AI via cheat day 1, they do switch. But you're right they don't do it once they get it. I saw some wait up to 7 turns.