Ok I've been playing Necrons for a couple years now. I'm very against the Scarabs at a game of such a low model count. Remove both units of Wraiths and you can get another Warrior Squad with your lovable Disrupter Fields. You probably won't find another list with high a lot of Armor. But since you say you fight against 'Crons, IG, Tau, Eldar and Bugs, I'll see if I can tailor something a little bit better. And trust me, you need more guys. Your phase out is 7 guys. You have 26 bases to juggle against IG, Tau, Eldar and Nids, all of whom will be swamped.
I would be more comfortable seeing you drop the Wraiths and your Wraithlord and turn him into a regular Lord, get some more warriors and a few more scarabs. That will work perfectly IMO. Well godspeed and in the words of our people: '1001010110'