[Gandalf Parker]

Along that line, the best fix Ive seen for ai yet is well planned gods, scales, equipment, etc. A number of threads have asked, and received, peoples favorite builds. Such as, this gives middle age Pangaea a set version of Lord of the Wild named Natural Disaster with some added equipment, specific scales, and an ally preference. The number 40 stands for middle-age Pangaea if that helps to read the code.
#god 40 812 -- Lord of the Wild
#comname "Natural Disaster"
#allies 40 48 -- likes to ally with Oceania if they are both AI
#clearmagic
#mag_death 4 -- needed for Pangea spells and a bless
#mag_nature 4 -- needed for Pangea spells and a bless
#mag_blood 4 -- good combo with the above and a bless
#additem "Treelord's Staff" -- 2 more nature
#additem "Skullface" -- helmet with 1 more death and support
#additem "Armor of Souls" -- armor and 1 more blood
#additem "Boots of the Behemoth" -- goes well with his size 6
#additem "Brazen Vessel" -- misc slot and 1 more blood
#additem "Ring of Sorcery" -- 1 death and 1 nature and 1 blood
#dominionstr 40 6
#scale_chaos 40 2
#scale_lazy 40 2
#scale_cold 40 -1
#scale_death 40 0 -- this line might need removed
#scale_unluck 40 -3
#scale_unmagic 40 -1

-- 6 points left over

The points left over dont really matter unless you want to play it yourself since you can give an AI more than the points would allow us to have. Adding those lines to any favorite map will cause middle age Pangaea to get that whether its a human player or an AI.

Suggested builds like this have been incorporated into the SemiRandomizer program of Ballbarians. Using that program will assign the AI's more intelligently designed setups from the many files that were provided from expert players. If you feel you can build a better Fomoria or Gath then Im sure he would love to have them.
edit: you dont have to give them in map commands like I did altho it helps. Just a description would work and others can convert it to commands if its interesting.