Dark Eldar VS Necrons 500pts

Hello Commorragh!

I'm nLHaD, new to the forum and new to Dark Eldar.
I've just purchased a large amount of Dark Eldar because the models are amazing, but I am relatively new to playing actual matches (I mostly just paint and create).
A group in my town is starting up an Escalation League with some interesting rules to it.

Mostly, I am looking for advice on how to go about fighting against Necrons with Dark Eldar. Whatever help you guys can give me will be greatly appreciated, and I will post the battle report afterwards so you can all critique my methods and make me worthy of playing such a beautiful race.

Here is what I have;

HQ:
Archon
Succubus
Drazhar

Troops:
50 Kabalite Warriors
30 Wyches

Fast Attack:
2 Raiders
1 Venom
5 Scourges
2 Razorwing Jetfighters

Heavy Support:
1 Ravager

All these are unbuilt so I can build them whichever way I want (aka Kabalite - Trueborn)

Interesting Rules included is that if I take an Archon or Succubus their base point cost is reduced to 0 and I only have to pay for upgrades / wargear.

Thanks in advance for any help your collective minds can give me.

I'd say Succubus w/ Glaive + 6 Wyches, one with Hydra Gaunt

One raider gunboat, 1 venom warrior.

1 rav.