Don't know if this has been brought up before but could Inrilatas be Kel's hidden voice?

"Perhaps he's locked in a room. Perhaps dying is that room's only door...
"Locked in a room!" the young Prince-Imperial cried laughing. "Yes! Clever-clever-cunning-clever!"

We know Dunyain mostly speak truth when facing each other, so instead of telling the truth of Kel's hidden voice could Inrilatas be confirming his part in the voice here:

"And his brother's voice resonated, climbed as if communicating up out of his bones. "You think you seek the love of our mother, little brother—Little Knife! You think you murder in her name. But that love is simply cloth thrown over the invisible, what you use to reveal the shape of something so much greater..."
Memories tumbled into his soul's eye. Memories of his Whelming, how he had followed the beetle to the feet of the Grinning God, the Four-horned Brother, how they had laughed when he had maimed the bug—laughed together! Memories of the Yatwerian priestess, how she had shrieked blood while the Mother of Fertility stood helpless...
And the boy could feel it! An assumption of glory. A taking possession of a certainty that had possessed him all along—possessed him in ignorance... Yes!
Godhead."
 
we know Inrilatas thinks of himself as the ultimate expression of a soul that moves itself and via the voice he's implanted in Kel's mind he creates the circumstances for his escape, Death.

hopefully you guys can see where I'm going with this crackpot

If you were the world's only adult and all others were toddlers,  would you not seek to guide them? Impose order on the chaos they would naturally create?  would you not seek to Come Before Them?

Since the Cishuarim are also salted by chorae I'd say the theory applies to them as well, regardless of their faith or the lack of a sorcererous mark