Re how much menthol: you could get 1 Dark Horse and 1 Menthol Ice and let him experiment with how much menthol he likes.
You could try getting some Blade Runner too. I was a menthol smoker and in my first year
vaping, I used to mix Dark Horse and Blade Runner as one of my early favorite vapes. (But I smoked Nat Sherman Naturals which are more minty than menthol.)
BTW, Army, I have several aged (like almost 2 years) HHV NETs that are great. It may not be recommended to keep them that long but I was curious and the result of my experiment is they are tasting great. I think the Gandalf /Legend got even better! The cherry pipe tobacco taste is more prominent. The other standout is Dragons Fire.
vaping these on an (authentic) Veritas
rda, vertical dual coil build , and an "Orchid v4" RTA horizontal dual coil.