I've been struggling for a while trying to find the best NR settings in LR. Well, the Christmas break has given me some time to experiment and I've found some standard settings that suit me well and give results I'm really pleased with.
I'm not one to super fine tune sharpness and NR for each photo as I often have 50 to 100 photos to process from a family event or outing, so I've made three presets with Low, Medium and High. So as a standard process I intend to apply them as follows...
ISO 400-800 = Low
ISO 1600-3200 = Medium
ISO 6400-12800 = High
Screenshots of each setting are below, in the same order as above, note that my camera is a 5Diii, so your camera needs and preferences might vary.
Hope this helps someone. It would be great if others were to chip in with their Lightroom NR process, or presets.