LS Necro managed Masters on Varesh, it was the closest she has come to dying since Magni. The whole party was dead, a mass of tormented creatures were piled up, but Varesh had no health left, so I kept at her. Luckily for me, the mission ends instantly when she dies.
The rest of NF should be a breeze.
* I need to start poking at the Foundry again. I think most of the guild only needs it now.