You're not likely to find AI mods because AI work is extensive, and probably can't be modded beyond diplomacy. On that note, Falcon AI is probably the best one. What, specifically, are you looking for? "Better AI" doesn't say very much, because AI is not an easy thing to improve, and the one thing it lacks notably in, combat, is the hardest to fix. I even find the Falcon AI mod redundant with BNW.
You asked for mods, though, so here are a few I use:
RED Modpack -- all units are scaled down except for actually large units. All units also have ethnicity graphics, so Japan's knights are different looking than America's, and so on. Even tanks and planes have ethnicity, so it is a huge mod.
Diplomacy Values -- shows you the numerical values of all opinion mods currently on you. Super informative and shows how warmonger hate works.
Strange Religions -- adds DOZENS of religions, real and fake, including Scientology, joke religions like Pastafarianism and Haruhiism, and fictional religion-organizations like the Illuminati and Brotherhood of Nod. Not much use mechanically, but fun.
Copper Buff -- adds copper to the Mint and Forge modifiers, albeit the Mint only gives 1 gold for Copper.
