So, I've been toying with the idea of taking advantage of being able to take two detachments at 2000 points. The resulting list, in it's current form, is:
HQ: Eldrad Ulthran (1#, 210 pts)
1 Eldrad Ulthran, (replacing codex powers with divination ones)
HQ: Farseer (1#, 175 pts)
Doom ; Fortune ; Guide ; Runes of Warding; Runes of Witnessing; Spirit Stones
HQ: Warlock Unit (10#, 360 pts)
1 Warlock (Psyker; Conceal
1 Warlock (Psyker; Conceal
1 Warlock (Psyker; Enhance
1 Warlock (Psyker; Destructor
1 Warlock (Psyker; Enhance
1 Warlock (Psyker; Embolden
1 Warlock (Psyker; Embolden
1 Warlock (Psyker; Destructor
1 Warlock (Psyker; Destructor
1 Warlock (Psyker; Destructor
HQ: Avatar (1#, 155 pts)
1 Avatar
Elite: Fire Dragons (6#, 96 pts)
6 Fire Dragons
Troops: Dire Avengers (10#, 162 pts)
9 Dire Avengers, 162 pts (Fleet; Avenger S-Catapult)
1 Dire Avenger Exarch (Fleet; Bladestorm ; Power Weapon; Shimmershield)
Troops: Dire Avengers (10#, 157 pts)
9 Dire Avengers, 157 pts (Fleet; Avenger S-Catapult)
1 Dire Avenger Exarch (Fleet; Bladestorm ; Diresword; Shuriken Pistol)
Troops: Guardians (10#, 110 pts)
10 Guardians, 110 pts (Fleet; Shuriken Catapult x10)
1 Weapon Platform (Bright Lance)
Troops: Guardians (10#, 110 pts)
10 Guardians, 110 pts (Fleet; Shuriken Catapult x10)
1 Weapon Platform (Bright Lance)
Heavy Support: Wraithlord (1#, 135 pts)
1 Wraithlord, 135 pts (Flamer x2; Missile Launcher; Scatter Laser)
Heavy Support: Wraithlord (1#, 135 pts)
1 Wraithlord, 135 pts (Flamer x2; Missile Launcher; Scatter Laser)
Heavy Support: War Walker Squadron (3#, 195 pts)
1 War Walker Squadron, 195 pts (Scout)
1 War Walker (Missile Launcher; Scatter Laser)
1 War Walker (Missile Launcher; Scatter Laser)
1 War Walker (Missile Launcher; Scatter Laser)
The plan would be to deploy in two lines. The front line would consist of the warlocks (with eldrad and the farseer) in the center and a squad of dire avengers to either side. The second would likewise see the guardians on the flanks with the wraithlords and fire dragons behind the seer council. The warwalkers would outflank.
Basically, assuming eldrad got forewarning, the two dire avengers would be given the 4+ invuln save by eldrad, and the second farseer would fortune the seer council, giving them a re-rollable 4+ invuln save.
This line of invulnerable infantry would confer cover saves to the guardians, wraithlords and fire dragons making up the second wave.
Given the fact that the heavy weapons would be in the second "wave", I think most opponents would ignore the seer council and dire avengers in turn one (assuming they went first), only to realize their mistake when I start dropping my psychic powers around.