I'm loving this idea, and I'm quite excited about the possibilities.
I know we're not this far along in building this line of the story as the actual character is not yet created, but...what if Erebemlin & company discovered a fevered woman...somewhere...and Erebemlin (or Taitheneb as he's more understanding of humans) tries to bring her out and steps into her dream and...and find Mithrellas or more clues as to Nimrodel's location or something that makes them realize this woman needs to be kept around...
As I said, I know we're not this far, but I had to get the thought out there before it was lost with all the hoobalah in my life.