A full army with silver shield pikes (Seleucid) in the core, cretan archers for support, and elephants, chariots and cataphracts for flanks. And, a ten star general. I am on the way to assault Athens, currently held by Brutii.
Just beside is some rabble... some levy pikemen and such.
A full Roman army (mainly Hastati) attack the rabble, I elect to watch the AI perform by selecting manual. I get control of the rabble and the AI looks after the huge army led by my general.
So what does the AI do? Take position on a hilltop and pepper the Romans as they make their way up. Wait for pikes to engage enemy and then flank them using elephants, cataphracts and chariots?
NO! Everybody charges into the Roman army, yes even the archers. Guess who reaches first? My general, and my archers... they get cut to pieces in mid charge by twenty Roman units throwing spears! By the time I get to the field my army has routed, and I lose a battle which would set me back by about ten turns.
I am waiting for a patch for the AI! I really think this AI for written for the barbarian nations: it does nothing but charge blindly!