I am using the 80/20 projuice and find the throat hit is too much for me and the flavor at 18mg nic as compared to 0mg with VG is not as good. I would like to see a nice Creme de Menthe with a 70 VG to 30 PG mix.
The higher PG at 80 may be too high for you. It will give you more TH than a lower amount of PG. Depending on how many cigarettes you smoked per day the 18mg should be about right, but you could lessen it to a lower level to decrease the TH as well.
You could dilute the current mix you have a bit and that may help too.