Vivienne was, arguably, more suited for Darkspawn. And Cadash made it clear, Dorian had to look after Cole for her.

Cole hadn't really changed the whole time he had been asleep. He didn't move. He just breathed shallow, soft breaths and stayed exactly as he had fallen asleep... or been moved since.

Until he did come awake, eyes hemorrhaging Fade energies, pale, brilliant blue. "No!"