Nightshade Pass Issues

the Troll near the bridge still sometimes runs through the mountain side there randomly. Less often now... but still does. Also when Im running around in that scene, i lag like crazy. major FPS drops and feels clunky going down and up those huge hills when first entering the scene from both sides. My camera goes crazy and bounces everywhere and seems like this scene has a lot of extra fps drops. Doesnt do this in other scenes.