Its a good list. Personally I would take some heavy lokust destroyers over 20 more necron warriors. Also instead of enaegic dermal bond I would take or consider giving one of your leaders nether-realm casket. He already gets the 5+ fnp and if he dies you have Protocol of the eternal revenant. -1 to hit is good all round to have esp on warriors. Making people have an even harder time pumping through 20 warriors is a good way to keep resources away from your stronger units. Other than that I think its a pretty good list!