To follow the tradition of 3rd edition Epic, the Eldar Knights have only one unit in the army list. Abstraction and simplifying units are THE BASIC ideas of 3rd edition. So I strongly believe in this, and sticked to it.
There are 3 types of Eldar Knights known. The fastest is the Bright Stallion. If you are using that miniature, then I recommend to apply the official vehicle variation rules. --> Add ability "Fast". (This adds +5 cm to speed and lowers armour with -1.)
I kept the Eldar Knights available for leaders. The rest is in support only. They are rare vehicles... No dedicated detachment lists for Knights are available. I don't find that "realistic". I also choose not to make them warmachines. Just regular vehicles. (Because they're agile.)
Download PDF:
http://www.tocoking.be/homerules/'njoy!