Legion Praetor (Cataphracti Armor, Paragon Blade, Combi Plasma)
Veteran Tactical Squad (Missile Launcher with Suspensor and maybe Flak?, loads of Bolters otherwise), SGT with Artificer, attach a Medic?
Rhino w/Havoc Launcher ? Maybe...
Terminator Squad (10, mix of weapons)
Spartan Transport, Cermite)
And... Mkay, that comes to 1200 or so points... Maybe a Mortis class DN for the Wolves? The Las Cannon option is pretty powerful... Maybe keep the Forge Lord and maybe try out the Medic?
Not sure, the Void Shield Generators in the Siege book seem pretty darn good... Thinking they might well be the one thing that stops fliers and the superheavies... So may well be something that becomes semi required... Will have to come up with some terrain to become a Shield Generator...