Well, take this with a pinch of salt because I haven't actually beaten the new Necrons either, but high-strength low ap large blasts and high strength low ap close combat on units that can sweeping advance seem to be the trick. Unfortunately for DA, that basically just leaves Imperial Knights. Deathwing Knights will do pretty well, seems like you just got unlucky with those - basic Warriors really hate Str6 AP4. The regular Terminators, not so much - a squad of Terminators shooting, even with a Plasma Cannon or Cyclone Missile Launcher, will be lucky to kill a Necron Warrior or two. They're strictly inferior to, for example Hammernators or even Lightning Claw Terminators in this instance because their guns are just going to bounce off of Necrons.
The all-Bolters-all-day Ravenwing list might give a good account of itself as their massive rate of fire should counteract the usual uselessness of firing small arms at Necrons.
Learership modifiers and checks, while hard to come by, are apparently pretty good (Terrify a block of Warriors for example) but I can't say I've ever seen it - too much of the army is Fearless or Ld10 and resilient enough not to take morale very often at all.
Killing the Tomb Spyder first will remove Reanimation Protocols from the Wraiths, taking them down from 'borderline broken' to 'very powerful'. Rad Grenades are also a big help against them.
I would say give me a few more games against them and I'll come up with something (having just completed 1500pts of Space Marines, who are similar to DA), but since the only Necron players I know have quit the army due to the new Codex, I don't think I'm going to get much experience against them.
The all-Bolters-all-day Ravenwing list might give a good account of itself as their massive rate of fire should counteract the usual uselessness of firing small arms at Necrons.
Learership modifiers and checks, while hard to come by, are apparently pretty good (Terrify a block of Warriors for example) but I can't say I've ever seen it - too much of the army is Fearless or Ld10 and resilient enough not to take morale very often at all.
Killing the Tomb Spyder first will remove Reanimation Protocols from the Wraiths, taking them down from 'borderline broken' to 'very powerful'. Rad Grenades are also a big help against them.
I would say give me a few more games against them and I'll come up with something (having just completed 1500pts of Space Marines, who are similar to DA), but since the only Necron players I know have quit the army due to the new Codex, I don't think I'm going to get much experience against them.