Necron army

Is this a good army? (Around 1000pts)

10 Necron Warriors 5 Immortals 3 Canoptek Scarab Swarms 3 Skorpekh Destroyers + Plasmacite 1 Overlord (Tachyon Arrow) 1 Canoptek Doomstalker 1 Szarekh The Silent King 5 Deathmarks