So I'm scratchbuilding a necron titan based on this image
EDIT: My picture isn't working so here's a link to it till I can fix it
http://vyperchild.wordpress.com/2009/06/21/automarines/
I'm going for a bit of a mix between a warhound and reaver but with more synergy with the army then pure brute force. (Excuse the name I just did what all necron things seem to be named these days

)
Canoptek Tesseract Triarch Tomb Ark Stalker- 1350 Points
Av 14 14 14
BS 4
WS 4
I 2
A 4
12 Hull Points
3 Void Shields
Wargear:
Phase Shift Generator
Doomsday Matrix (Left Arm)
Doomsday Matrix (Right Arm)
4 Gauss Flux Arcs
Special Rules:
Phase Flux-
The CTTTAS may always use its invulnerable save given by its Phase Shift Generator (even against S D weapons!) And it may not be negated for any reason. However, should the armies amount of total units fall below 33% then the armies forces do not have the power required to support such a powerful structure and it immediately suffers a titanic explosion for each game turn the army stays below 33% total models. The Phase Shift Generator's save may not be used against shots resolved against voidshields of any kind.
Flux Power Control-
The CTTTAS may Forgo its shooting attacks to count as being armed with 2 Titan Close Combat Weapons
May take one of the following:
Resurrection Matrix-100
Nightshroud Matrix-150
Stormcaller Matrix-75
May exchange both Doomsday Matrixs for two of the following:
Gauss Annihilator-free
Tesla Destroyer-50 points
Doomsday Matrix:
Concentrated Blast
Range 120" S 10
AP 1 Heavy 1 10" Blast
Dispersed Array
Range 60" S 8
AP 2 Heavy 2 7" Blast
Gauss Annihilator-
Focused Beam
Range 120" S D
AP 2 Heavy 3
Flux Arc
Range 18" S 6
AP 3 Heavy
2D6
Tesla Destroyer
Range 48" S 8
AP - Heavy 8, Tesla, Destroyer Arc
Destroyer Arc-
This rule works exactly like the standard arc rule except the range is 12", occurs on a 5+,
2D6 instead of
D6 hits, and are resolved at strength 6
Resurrection Matrix-
All Necron models within 24" of the CTTTAS count as having a Resurrection Orb
Nightshroud Matrix-
The CTTTAS counts as being a node for all friendly units with The Nightshroud and Nodal Grid special rules
Stormcaller Matrix-
The CTTTAS is treated as being an additional Harbinger of the Storm for all friendly Stormcaller War Cell formations in play