Firstly, stick to regular human pheros, you can try the deer stuff when you have the love scent stuff under your belt (not literally...).
The OD point for -none is about 0.04mg per dose, but dont take this as an exact value. The optimum dose is around 0.02mg, so i think you are on the right track.
2 drops of NPA is 0.048mg, which is basically 0.05, and hitting OD land. But if you spread it out you can get away with it, so just try things out. I sometimes wear 3 drops in my pits/crotch, and then more of other -none products else where (but not too much more).
0.04-0.05 is the begginings of an OD, and that represents the total -none that you apply.