So, Necrons have been out for a bit and I don't think I can resist them any more. It seems like they have a lot of different build options and that's the most important selling point for me - I like variety. It single handedly kept me from GK.
Anyway, I tend to avoid the obvious choices so no Stormlord or Scarab farm. After that here are my picks for the best the book has to offer.
#1: Crypteks - affordable, interesting and unique weaponry and wicked wargear. There are just SO many options with these guys I think that any HQ which doesn't unlock a Royal Court is garbage on this fact alone.
#2: Wraiths - They may drop a bit if wound allocation goes away, but until then they are fast, tough and a threat to any non-dedicated assault unit, not too mention really cheap without upgrades.
#3: Tesla (esp Tesla Desructors) - better than Gauss by a reasonable margin outside rapid fire, and you don't really want to be in there anyway. Annihilation Barge is super cheap with TW Tesla Destructor which makes it awesome.
#4: Command Barge - hit an enemy vehicle with your Warscythe on a 4+ even if it went flat out? Brutal.
Anything I'm missing?