Very good, you've pretty much got us down pat!
A few things though:
"Close combat is useless here, since Banshees can’t even touch them and scorpions need a 6..." from the Destroyer section. Banshees need 6s and Scorpians need 5+, and I'm assuming this is to wound rolls.
And you should probably mention that if you get the chance to take out the Lord, TAKE HIM OUT. Necrons generally crumble without him. Plus I think it would also be good to put in a cautionary word about the Gauss ability of all Necron guns and what they can to to vehicles.
Other than that, good job!