Mainly checking for lore accuracy for now, but I think I got it right. Adding more later.
The Bensekhtey Dynasty was slightly peculiar among the various ancient Necrontyr dynasties. Always at its head was a female Phaeron, and always did she have an obsession with her own looks border lining on the insane. But that isn't what was strange, for most phaerons had their own quirks and odd happenings, and often these quirks would carry on through the generations. What is odd is the Bensekhtey's obsession with outward appearances, that carried on even to death, and their encapsulation in the metal sarcophagi all Necrontyr now call home. Painted in a purple and gold scheme, two colors that may very well compliment each other, comes off as gaudy and impractical in times of war. The reasoning for this is always the same, they are colors of beauty, and the only sort befitting the ancient and vain dynasty.
High ranking soldiers would oft' times wear great robes of intricate detail, and carry ornate weaponry whose purpose was more for showing off, than practicality. Much of the nobility in this Dynasty would take to works that were normally considered below them, those of painting, of designing, poetry and all the various arts. Indeed, they were quite good at this. The crafts made by the nobility of the dynasty being some of the Necrontyr's greatest works outside the domain of war.
The last ruler of the dynasty was Nafrica. A vain woman as all the phaerons were. At first she was ecstatic to take up the new bodies being offered to her own, going so far as to recruit the greatest Crypteks and artisans she could muster to design for her the perfect new form.
When she finally transfered her conscious to the new form, she was joyful at first. But as time wore on she grew to hate what she had become. A hatred she took to her long rest. Awake once more, her goal now closely resembles that of the Zantragora dynasty, that is apotheosis. Apotheosis of her own form, of her own beauty so that the whole of the universe can realize her and her dynasty for what it is: perfection of art, perfection of form, perfection of purpose. She leads her armies from world to world, seeking new test subjects for the various Cryptek under her employ, taking back as many as she can in as perfect a shape as she can. From time to time she'll judge one from the mortal rabble as being special among their kind. Allowing them to serve her as a servant for as long as she deems. Those that are given this honor typically serve for their lifetime; for what is a lifetime for a mortal, but a few mere moments for one that will never die.
Notable members of the Dynasty: (stories coming later, for now, specs)
Phaeron Nafrica:
Will be a phaeron, uses the Dark Eldar Llamean model but with arms, legs, and head replaced with necron bits.
The Silent Sage:
A counts as Anrakyr the Traveler
One of the few remaining Technomandrites
Made Nafrica's body, for this was given position in her dynasty as an Overlord
Wears a cowl because he's paranoid people will see him for what he is.
Never speaks
Other:
If anyone wants to make their own symbol, here is a basic template. It's half because the necron symbols are symmetrical down the middle. You'd do one side, then flip it.
Color scheme till I can make my own:
Eldar 
-5000 points