I vape 36mg consistently but I can also do 24mg without any issue.
Where on earth did you find 42mg juice? LOL
Not sure if I should name the company so I wont till I ask. But talk about service. They returned a phone call in like 5 mins and asked me what I needed. They are custom mixing me some juice. I will ask them,if its ok to post who it is,I will. Is it ok to post that here? Anyone?

1 pack 120 length lights/ now half pack plus 18mg liquid 2ml a day

About the same here.Smoked 2-3 packs a day. Now I vape 36mg about 2ml a day. Got some 42mg comin tho