Two comments:
1. on the elephant-thing:
Id love to see the elephants as an own tactical unit, rather than beeing a flavor-cavalry and i think it could be a good idea to give elephants the ability to clear jungle.
But: There are three types of elephants: Asian, North African Wood-Elephant (extincted) and the African Elephant.
Only the asian elephant should be able to clear jungle, because only in india were elephants used to do this.
To train the huge african elephant isnt even possible, so this one shouldnt be in the game (e.g. Elephants in south africa are ok for ivory, but not as prerequisite for units).
The difference could be:
Asian Elephant has more hit-points (due to its higher mass) and better a-d value, moves 1. African Wood-Elephant has movement 2 and fast movement through forest and perhaps even hills/mountains (these are the ones Hannibal took over the alps).
I think War-Elephants really can be a devastating unit, but should be very, very expensive.
If you dont do it, i will include it in my mod which will be released... uhm ... maybe in 2012 or 13
2. Civ-List:
You didnt want to include Vandals and Carthage, because they would have a almost equal city-list. The same thing it is with Parthia and Persia: The Parthians were Nomads who founded an empire within Persia after they defeated the Seleukid Greeks who ruled Persia before.
Parthians could be seen as a persian Rulers-Dynasty, like in later times the sassanids, who on their part dispersed the parthians.
So: Perhaps Parthia should be no own Civ, but there could be some nomadic Horse-units in the persian tech-tree to represent their Rule and influence on culture and warfare in Persia.
Thats it for now
