Well because I have a little time on my hands ... and those cool WarMaster models in those hands ... I was thinking  ... which could be dangerous !   

  After studying the Necron Raider Rules. It appears to me  like a number of GW armies, the Necrons really lack enough long range heavy weapons. Especially when it comes to Titan killing ...   
 My machinations on the subject : 
 The C'Tan in the bottom pic. On Left, mounted  = MOLDER OF WORLDS,  has all Nightbringer stats but WPNS = PYLON ... COST = 350 
 In the top pic. The C'Tan on the Right  = THE DECEIVER - stats in Raider book   
 The C'Tan on Left, mounted  = Void Dragon,  has all Nightbringer stats but WPNs = AEONIC ORB ... Cost = 700.   The Middle C'Tan on foot = The Outsider : again, Nightbringer stats  but = WPNS = SCYTHE CLASS STARSHIP ... COST = 350  ... Like I said, gives the Necron a little  more firepower and better Titan killing capabilites ...  Any thoughts ?  Based on "Raider" rules, 0-1 C'tan can be used, & they count toward War Engine allocation.  Plus NO More than 1/3 of your points can be used on WE ...