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just a list I threw together, though it was entertaining
ideas is Monoloths drop it, use the portals to transport in the C'tan
Necron overlord hangs back with Crytek
lords join warrior squads

Necron overlord-130
warscythe
speiternal weave
phylactery

nercon lord-80
ressurection orb
MSS

nercon lord-80
ressurection orb
MSS

Crytek (Harbringer of Transmorgification)-55
harp of dissonance

10 Immortals-170
10 Immortals-170

C'tan shard-235
Writhing Worldscape
Pyreshards

C'tan shard-260
Transdimensional thunderbolt
sentient singularity

C'tan shard-215
swarm of spirit dust
entropic strike

1995 pts
not really a competative list but something I would play with against my friend
edit: fixed my list, missing about 600 pts
monolith-200
monolith-200
monolith-200

I don't see a monolith in your list.
Other than that, I'd drop the necron lords, and get more bodies to make this list remotely competitive.
That,and hope your opponent is packing only a little anti-armor and high strength weapons.