This is the closest I've come so far to being happy with it but still feel like I might be losing some firepower out with it.

Combined Arms Detachment:

HQ 1: Autarch - Fusion Gun, Warp Jump Generator, Scorpion Chainsword - 93
HQ 2: Farseer Skyrunner - The Spirit Stone of Anath'lan - 130

Troops 1: 10 Guardians - Scatter Laser - 105
Transport 1 Wave Serpent - Shuriken Cannon & TL Scatter Lasers 125
Troops 2: 3 Windriders - 3 Scatter Lasers - 81

Heavy Support 1: 5 Dark Reapers - Exarch - 140
Heavy Support 2: 3 Falcons - 3 Shuriken Cannons, 3 Scatter Lasers, 3 Pulse Lasers - 405
Heavy Support 3: Vaul's Wrath Support Battery - 3 Vibro Cannons - 90

Lord of War: Wraithknight - 2 Starcannons - 335

Aspect Host Formation (+1 BS):

5 Fire Dragons - Exarch - 120
5 Fire Dragons - Exarch - 120
5 Warp Spiders - Exarch - 105

Comes to 1849pts.

The basic strategy being Autarch is Warlord, joining Warp Spiders. Warp Spiders and Fire Dragons deep strike in the Falcons. Farseer Skyrunner joins the Windriders and goes for Invis for the Wraithknight. The Dark Reapers, Vaul's Wrath Battery and Wraithknight sit as far back as possible shooting anything they can. The main weakness I can foresee is anti-air as I only really have the Dark Reapers for that.