First Army - Necrons

My son has started collecting Necrons. It has how I got into this damned Warhammer mess... er... hobby.

A 500 point army for Necrons is very straightforward. By straightforward I mean there are very few choices to make.

Let's look at the requirements for a legal army. It has to have a minimum of two troop units and one HQ unit.

Necrons only have one choice of troops - Necron Warriors - and one choice of HQ - Necron Lord.

Necron warriors

* unit size 10-20

* basic cost: 18

= 2 troop units of 10 Warriors for 360 points

Necron Lord:

* independent character

* basic cost 100

= one HQ unit for 100 points.

That leaves us with 40 points. There are two viable options for these remaining points, and both are an upgrade to our Necron Lord. Before discussing those, it is worth mentioning I have ruled out buying two more warriors (for 36 points) and equipping the two Warrior units with disruption fields (for 40 points). Two more warriors does not add much interest or diversity to the army; disruption fields seem unnecessary give the anti-tank capabilities of the warriors' guas weapons.

Upgrade One:

* resurrection orb: 40 points.

* benefits: helps with "we'll be back" roles and that helps prevent fade out.

Upgrade Two:

* Warscythe: 10 points

* Destroyer Body: 30 points

* Benefits: Agile, jet bike movement for the Lord; improved +1 toughness; strong CC weapon, able to chop-up vehicle armor, or take out the enemy's HQ unit.

Well, there they are. Any thoughts?

Edit: There is a third option for the last 40 points: three scarab swarms with disruption fields for 36 points. This creates more target opportunities; a way to tie up units and even armor while warriors advance.