Don't forget it isn't just the nicotine strength that counts, but how much of it you are vaping. "Wow I only vape 8 mg" "but I vape 6 ml of the stuff a day" sound familiar?
I've been vaping 24 - 36 mg @ 2-3ml of juice a day since I started vaping a couple of years ago and don't plan to lower the nick, I may try to cut down on the quantity, eventually, but I'm in no hurry.