The problem with most menthols is that there is too much menthol in them. Very lightly mentholated snuffs can be a whole different matter. I often add one part menthol to my snuff of the moment and it just gives it a slight kick without giving you the symptoms of a heavy head cold. Some of the Dholakia’s are good in that respect - Aniseed menthol for example.
That is exactly why I started mixing menthols with scotches. It truly is a best of both worlds for me. Ken