Dire Avenger are more the "generalist" kind of fighting unit for Eldar. The closest comparison one could probably make to another race by the role they fill is probably a tactical marine.

Hey, the Eldar are supposed to rule

Check out Black Crusade for stats on the Dark Eldar Mandrake and Incubus and Kabalite Warrior.

So Fallen Suns is out and here is the update on Eldar:

another named Farseer, another named Warlock. Possessed Warp Spider Aspect Armor and Exarch Armor, Harlequins and more shiny eldar ship goodness. Oh and possessed Wraithguard

Cmon FFG, make the Eldar actually have something to them than just 1 Aspect squad, rangers, some psykers, wraithguard, and a robot.