Shame Reapers are running in last even if only by a fragment. Reapers are beyond any doubt the greatest asset of the Eldar warmachine.
I don't know... I think the point of Eldar tactics is that they have no single greatest asset, each aspect has very specific strengths and weaknesses. Dire Avenger is my choice, pretty flexible troop type that can deal out some decent ranged damage.
http://www.forgeworld.co.uk/Warhammer-40000/Eldar/SHADOW-SPECTRES-ASPECT-WARRIOR-SQUAD.html these guys, too lazy right now to upload a picture so link! and this was if I played elder >_>
Warlock, man. I want to stab some space marines with a spear and grill them with my potent psyker powers.
Unfortunately not, but here are two more pics I have from him; Right click and view to see full resolution
http://static3.wikia.nocookie.net/__cb20120918161615/warhammer40k/images/a/a9/Eldar_Warlock_2.jpg another picture for your warlock guys, yes I'm being lazy today and not uploading :u sorry. it does seem to have a similar style to the black library games day anthology 2011/2012 cover art that zzulu has up there. and to answer you guys as to the artist, went and found my copy of the anthology, the artist is Clint Langley
As much as I'd love to be harlequin, I honestly don't see them allowing them being an Eldar class. Harlequins have been stated not to belong to any one Eldar Faction. They help Craftworld Eldar, Dark Eldar, and Corsair Eldar, showing favoritism not to any one faction, but to the Eldar race as a whole. If they make it an Eldar class, it would be unfair to Dark Eldar (Provided they get introduced at some point, one of the head devs expressed high interest in putting them in) to not have Harlequins themselves.