Agreed, the frontal cavalry charge is the AI's only tactic, it seems. However...

Quote Originally Posted by DisruptorX
...massive cavalry charge. It is completely unbeatable...
it is beatable, I've done it seven or eight times now. Put your units in a deep formation, make them stand still with their shields to the fore, and those horses will not break them. Even one-valour Hastati can weather a head-on cavalry charge. Flank or rear, and your unit will be destroyed, but head on if they're ready they'll weather it and the cavalry will get mired in your formation and taken down, unless they've got much better armour.