Someone over on SC's facebook (where this is also posted), said that High Templars are ones who embrace the Khala, while DT reject it. I admit I'm behind on my SC lore, but I like doing art that have twists on what's familiar. So I'd like to think DT figured out a way to harness similar High Templar powers through other means.
The female DHT looks very similar to 'canon' protoss females; good job. (Check out the SC wiki and you'll see what I mean.) While no in-game reason why females don't fight has been given that I know of, I assume that female protoss are the healers, lorekeepers, and priestesses while the men are the rulers and warriors. There are female dark templars (such as Matriarch Raszagal and her daughter) in game, but no canon zealots or high templars as of yet. (I haven't played Lore of the Void, but I've been through the wiki reading up on protoss, since they're my fave of the three races.)
I get a kick out of the DT hero using a hydralisk skull as part of his vambrace. That's a really nice touch, in keeping with how the three protoss factions have been depicted so far. (That, and it reminds me of the Alien vs. Predator movies. Makes me want to try to sculpt a hydralisk skull trophy like Jimmy's got in the Hyperion's cantina!)
60 shield/60 hp/150 energy
AA: 5+1 (against psionic 20+4)
Attack speed 1
Movement speed 2.1
Gravity trap - Dark High Templar uses Void power, creating field that sucks in units. 100 energy, 9 range, 2 radius
High templars themselves have not embraced the khala any more than a Zealot. It's just that their psionic powers are higher than that of your regular protoss. But it is true that the Dark templar are not part of the Khala as they are afraid of losing their identity in the process.
The Khala however does not provide with any special powers or so but rather allow the protoss to train their own powers much safer by providing with a "guiding light" so to speak.
Dark templrs should be able to harness the same powers as that of their light brethren but would have to do so without the guiding light of the Khala and so with much higher risk of accidents and so.
Dark Templars often believe that the Khala which connects the minds of all Protoss robs them of Individualism and so they cut themselves off from the Khala. often by cutting off their "hair" which is their connections. Dark Templars are often connected to the void and I'm thinking that Void Shaman would fit them more.