I played 1 game at Chieftain, then 1 at Warlord, then 2 at Regent (1 military VC, 1 peaceful). I think I played two at Monarch, which were noticably tougher, but still not too bad, and then moved up to Emporer, where I played 5 or 6 games. I now consider myself comfortable at Emp, but the first game or two were tough going at first. I'm attempting my first Demi-God game, and it's hard to catch up when the AI starts with two settlers. Wish me luck.