How do the AI Heroes level up so fast?
I started my first game with difficulty of best AI but without the cheating. My Leader has done all the exploring and participated in every battle. I declared war and forced one of my enemies to surrender after my Leader (with army) captured several of his cities. My Leader is now level 8 which I thought was pretty good. I discovered the enemy Leader, who surrendered, and he is level 14! How did he outlevel me by so much? My Leader has been battling almost constantly. Am I missing some game fundamental?
Thanks for the help!