Starting up a Necron army and this is what I'm thinking of running:

Necron Overlord w/ Warscythe Command Barge Mindshackle Scarabs

5 Crypteks:
4 Harbingers of Destruction
1 Harbinger of Despair w/ Veil of Darkness

Necron Overlord w/ Warscythe Command Barge Mindshackle Scarabs

5 Crypteks:
4 Harbingers of Destruction
1 Harbinger of the Storm

5 Deathmarks (Harbinger of Despair and Harbinger of the Storm join this unit)

9 Immortals w/ Tesla Carbines
9 Immortals w/ Tesla Carbines
9 Immortals w/ Tesla Carbines
9 Immortals w/ Tesla Carbines

Annihilation Barge
Annihilation Barge
Monolith

I can switch out the carbines on 1 or 2 of the units for the gauss blasters for some anti-vehicle shooting. New to this army so any feedback is appreciated.