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I'd try N/S all around. If you run into problems at the bottom of your neck where most gents beards switch to a S/N growth, you might have to do the bottom 1/2" S/N for comfort sakes (I sometimes do...

I would suggest moving towards a complete shave going N/S only unless there is some area where that would be completely against the grain. Once you get a complete shave under your belt you can start...