casse

[Ludens]

I try to use them like equites romani/extraordinari as "shock troop" type units.

You know, pound into an engaged unit from behind then pull back, or scatter missle units, or chase down fleeing units.

I can't seem to get the chariots to do any of those effectively.

Chariots aren't killing machines, their role is to harass and disrupt the enemy. Their melee attack is low, but their main pro's are their missiles and their morale function: their presence scares the enemy and encourages allies. The best way to use them is to get them behind enemy lines and pelt your enemy with javelins. Only charge when the enemy is on the point of routing, as they simply don't have a melee attack to speak of. Stay away from light troops: your bulky chariots are very vulnerable to missiles and light troops also get an anti-chariot bonus in melee.

You can also use your chariots to disrupt charging infantry. Simply order your chariots to move through the enemy infantry. The enemy formation will be disordered and they will have lost momentum, making them vulnerable for a counter charge.