Re: Chariots -- how to counter them?
If I have a lot of archers, then I kill chariots that way (don't forget to give them a spearman guard unit).
Javelins are better - but you are unlikely to ever be in range.
The way to kill chariots in melee is to stop them moving. You need something that can either catch them (light cavalry), or persuade them to attack you (slingers maybe). Once you have successfully engaged them, you need to pile in with a lot of infantry.
Chariots have a bonus against cavalry, so don't allow your cavalry to have prolonged contact with them.