I have had mixed luck with
DDAs and Pylons - I ran 2
DDA recently and killed one Armiger all game. The Flayer Arrays killed way more
lol
Similarly I played in an ITC tourney, with a pylon - Game 1 killed the Great Unclean one - 1 Shot
Game 2 I popped a knight a Slam Captain and a 2 Armiger - 1 Shot each
Game 3, The opponent's knight made his saves walked up and flattened the Pylon.
Ultimately my take away is a Pylon only needs 2 failed saves and ANY Knight is gone. Period
How about a mix of the Lists and the comments
First of all, take the cloak off your Cryptek and give him chronometron. He can auto advance 6 because of Nephrekh, keep up with your destroyers and give them a 5+ invul.
Battalion +5CP - Nephrekh **For Movement**
Cryptek - Chronometron, Veil of Darkness
Lord - Warscythe Warlord ?Immortal Will? **Buffs/Protects Troops**
5x Immortals - Tesla
5x Immortals - Tesla
5x Immortals - Tesla
6x Destroyers
6x Wraiths
2x
DDA **These flank the Pylon getting a 5++ and protect it from Slam Captains**
Super Heavy Aux
Pylon **5++ for all necron units within 6" - Deletes Knights**