__________________ "Happiness is a lie. Life is horror. The light is always dying all across the universe. The last star will flicker out someday, when it does, all that remains is shadow. And I will be its king!"'-Amahl Farouk
The Tomb of Sadow is probably a more potent nexus than Dromund Kaas as a whole. Nyriss would be pretty terrifying there - would anybody mind elaborating on why Jerec wins?
Even if he's telekinetically superior, it's not by such a margin that he could dominate Nyriss outright, and does he have any defenses against her FLS?
But no, it's not in the Valley of the Jedi. It should be above it. In fact, after that point, you have Kyle descending into the valley, and that should take quite a long time, so I don't think Jerec was amped.