*points you to his most recent Necron list he posted*
It's time for another round of 'Necrons do it better than TSons'... so yeah, I actually wrote one with a Vault. That should be fun, dropping a LoW worth over 25% of the army.
But yeah, I really think I may try using an Obelisk in a CSM list as a Silver Tower. Even with the issue of gravity pulse, it'd be great for them.