It is impossible to test AI for such a long run,
it should go completely nuts after 200-300 turns.
Try to speed up your game: smaller quadrant, less AI (10-12), no neutrals, high AI bonus.
TDM is a must. Proportion's AI is not good yet, but will eventually become better.
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It is forbidden to kill; therefore all murderers are punished unless they kill in large numbers and to the sound of trumpets. - Voltaire