You have to know she's there to save her. The three times I've been through the Druid Grove I've gone directly to the Sacred Pool, then end up approaching Nadira's outcropping from the steep side while exploring the Grove. The bugbear triggers before I even realize he and Nadira are at the top, and boom she's dead. I haven't made saving her a priority, and wanted to know if it was worth the effort, or reloading.
Frankly I found it easier to save Findal, mostly due to the advantage of surprise. The bugbear seems to trigger based on the party's proximity, whereas you can sneak up on the goblins threatening Findal and take them out before they can do much of anything.
