I don't hunt them, I trap them. My usual army when fighting something with chariots (especially chariot archers, like Pontus or Egypt) is 4 units of archers, 2 units of wardogs, 10 units of tough roman infantry, 3 units of cav and a general. I usually line up the 4 archers in front. I put a line of 7 of those infantry units behind that, 4 men deep. The remaining 3 infantry units line up behind the big infantry line, but only 3 men deep so they stretch out a bit further. Cavalry, dogs, and general are behind this. The archers shoot as long as they can. The majority of the time, the chariots wind up charging at the archers to run them off. I just manually run them back through the infantry line (turning fire at will off at this point), and let the chariots pursue them straight into the infantry. Chariots can usually penetrate a 4-deep line of infantry (about 2/3 of the chariots seem to come out the other side), but they've lost most of their speed and momentum, and cannot make it through the second line of infantry. At that point, the life expectancy of the chariots is measured in seconds. I chop them into firewood and move on.