Legion 4 wrote:
Here's what I got from Primarch -
http://www.netepic.org/netepic.html Worth a look !

Most of that exodite background info is simple rephrasing of the text in the 40k 2nd Ed Eldar codex. The troop list is home brew for the most part.
Basically, an army list designer has to come up with some solution to the problem of transporting the exodite infantry. Wave serpents are an easy solution because they already have models. I would almost prefer giving them raiders (if models were available) since those seem wilder and less high tech.
Other, more creative solutions are possible. Exodite use the webway as much as the other eldar do, so storm serpents or other forms of mobile gates are reasonable. They were farsighted enough to flee well ahead of the fall, and rangers get their cameleoline cloaks from the exodites, so maybe they could use deep strike instead of transports to represent them sneakng into forward positions.
In the end, though, if they don't use transport vehicles, they end up playing wildly different from the way 'normal' eldar play. There is the possibility that an exodite force would be a slow, footslogger army, which some eldar fans might disapprove of.