Dark Elfdar

Well, with all of Demitra's ravings about starting a Grey Knight army, that would leave us with a Blood Angel, Grey Knight, Plague Marine and Deathwing army. Quite a few MEQ armies there, and more than a few loyalist chapters. This has me pondering a Dark Eldar army. Two of my army lists have really caught my interest, and I will post them both here (of course).

The 1,750 point Wych Cult

HQ

-Lelith Hesperax
-Succubus with Agoniser & Haywire Grenades

Troops

-9x Wyches with Haywire Grenades, Hekatrix with Agoniser & Phantasm Grenade Launcher, Raider with Flickerfield
-9x Wyches with Haywire Grenades, Hekatrix with Agoniser & Phantasm Grenade Launcher, Raider with Flickerfield
-10x Wyches with Haywire Grenades, Hekatrix with Agoniser & Phantasm Grenade Launcher, Raider with Flickerfield
-10x Wyches with Haywire Grenades, Hekatrix with Agoniser & Phantasm Grenade Launcher, Raider with Flickerfield
-10x Wyches with Haywire Grenades, Hekatrix with Agoniser & Phantasm Grenade Launcher, Raider with Flickerfield
-10x Wyches with Haywire Grenades, Hekatrix with Agoniser & Phantasm Grenade Launcher, Raider with Flickerfield

Fast Attack

-2x Beastmasters & 8x Khymerae
-10x Hellions, Helliarch with Agoniser

This list has Troops-spam out the wazoo. The Wyches are highly aggressive attacking units, which could in the end spell their doom. The HQs are both butchers. Lelith is perfect for clearing out tough combatants like Space Marines. The Succubus with Agoniser is there for Monstrous Creatures (her fixed to-wound roll and ability to ignore armor saves will make a mess out of high-Toughness enemies). The low Armor Value of the Transports may be a hinderance, since any Raider that fails its Flickerfield save will probably be grounded, however the assaults pouring out of the vehicles will likely massacre anything they touch.

The alternative is a more balanced army, focused on more of an all-comers approach.

1,750 point Dark Eldar Kabal Army

HQ

-Archon with Huskblade, Shadowfield
-Archon with Huskblade, Shadowfield

Elites

-5x Incubi, Klaivex with Demiklaves, Raider with Flickerfield
-5x Incubi, Klaivex with Demiklaves, Raider with Flickerfield

Troops

-10x Kabalite Warriors with Dark Lance, Raider with Flickerfield
-10x Kabalite Warriors with Dark Lance, Raider with Flickerfield
-10x Wyches with Haywire Grenades, Hekatrix with Agoniser & Phantasm Grenade Launcher, Raider with Flickerfield
-10x Wyches with Haywire Grenades, Hekatrix with Agoniser & Phantasm Grenade Launcher, Raider with Flickerfield

Heavy Support

-Ravager with 3x Dark Lance, Night Shields, Flickerfield
-Ravager with 3x Dark Lance, Night Shields, Flickerfield

This is an army that focuses on redundancy. Two of everything leads to more target priority issues, especially with Ravagers and Incubi closing to take out big targets. The Archons' Huskblades and  Shadowfeld make him perfect for eliminating Monstrous Creatures and Independent Characters with its Instant Death capabilites. For Eternal Warriors and vehicles the Dark Lance volleys should make short work. Of course, Wyches are there to help remove objective squatters. Haywire Grenades make them capable of tearing open transports, and Agonisers are there for MEQs and the like. The Incubi assisted by their Archons should slaughter anything they touch, especially now that their armor no longer prevents them from being Fleet.

I'm leaning toward the second army, but the theme of the Wych Cult is just so hard to ignore.