It also depends on if you using a Tank or a dripper, as a tank needs thinner juice 50/50 or 70/30 and a dripper uses maxx VG no PG added. On 50/50 and 70/30 blends from TPA I use 10% flavor, for maxx VG I use 20%, but that also depends on the flavor as some are stronger than others.
I would do...