5k Apocalypse

I am getting my 5k apocalypse list together and I want to see what you guys think.
Unfortunately, I do not own any Imperial Armor stuff but here is where I am so far.



Aspect Assault Wave

Autarch (Mandiblaster; Warp Jump Generators; Scorpion Chainsword; Fusion Gun) //Fire Dragons//

Dire Avengers (Bladestorm ; Defend ; Power Weapon; Shimmershield)
Wave Serpent(Star Engines; Shuriken Cannon; TL Bright Lances)

Fire Dragons (Crack Shot ; Dragon's Breath Flamer)
Wave Serpent (Star Engines; Shuriken Cannon; TL Bright Lances)

Howling Banshees (Acrobatic; Executioner)
Wave Serpent (Star Engines; Shuriken Cannon; TL Bright Lances)


Spirit Host

Warlock (Destructor; Spiritseer Upgrade; Witchblade)
Warlock (Destructor; Spiritseer Upgrade; Witchblade)
Warlock (Enhance; Spiritseer Upgrade; Witchblade)

10 Wraithguard
Warlock (Enhance ; Spiritseer Upgrade; Witchblade)

Wraithlord (Flamer x2; Bright Lance; Missile Launcher)
Wraithlord (Flamer x2; Bright Lance; Missile Launcher)
Wraithlord (Flamer x2; Bright Lance; Missile Launcher)


The Phoenix Court of Khaine

Avatar
Asurmen
Baharroth
Fuegan
Jain Zar
Karandras
Maugan Ra


Other

Falcon (Holo-Field; Spirit Stones; Star Engines; Vectored Engines; Scatter Laser; Shuriken Cannon)
5 Dire Avengers (basic)

Fire Prism (Holo-Field; Spirit Stones; Star Engines; Vectored Engines; Shuriken Cannon)

Eldrad Ulthran //with Banshees//




The debate

Now, for my last 500 or so points I am trying to decide what would be more beneficial


1. I could beef up the Assault Wave with Scorpions

Striking Scorpions (Stalker; Scorpion Chainsword; Scorpion Claw)
Wave Serpent (Star Engines; Shuriken Cannon; TL Bright Lances)


2. I could add another formation, but I only own 3 War Walkers so 1 in each squad
The Cloak of Shadow and Web of Twilight formation rules makes this a tempting option

Shadow Walker War Walker Host
War Walker (Spirit Stones; Scatter Laser; Scatter Laser)
War Walker (Spirit Stones; Scatter Laser; Scatter Laser)
War Walker (Spirit Stones; Scatter Laser; Scatter Laser)


3. I could add more Farseers


4. I could add a beefy Harlequin Troupe to run with the Phoenix Court