Went with the bottom option and that did the trick. It's in an archive should could not be bothered to delete the nif.
Yeah I'd like to troubleshoot the crash. it seems to mostly be crashes in Whiterun Hold it happens at the border near loreius farm, up to Rorikstead and the main road outside the city with the farms is also bad. I don't have an Outskirts mod or SD's farmhouse fences which I heard can be a performance hog. Does dynamic lod introduce more drawcalls? I would think it'd be the opposite.
Crash Logs