[Sombre]

The AI seems to do pretty well with Ogre Kingdoms, probably because they have a non bless reliant scary early game, non research/gem reliant buffs and so on. Basically they work ok the way the AI plays, which is to throw tonnage of troops at you. You'll have to turn supplies up to 300% or the ai will starve all its armies though. Oh and they suck at using slave giants because they don't know how to give them orders to attack closest, so they hang around the back staying behind the troops. Doh.

They also did pretty well with the LA Hoburg nation last time I checked - Kingdom of Hoburg I believe. Similar reasons to Ogre Kingdoms, though I can't attest to it being 'well balanced'.

Good question though. Amos mods' make for scary AI opponents, but don't really fit that 'well balanced' idea, for example.