I just did a little math. If you wanted a pretty good dose of pheros (.03mg) with one shot, you should mix NPA with your cologne at 1 part NPA and 2.2 parts cologne. I know that sounds strong, but if you figure that the atomizer sprayer (TE\'s sprayer it at .13 ml) puts out .20ml and NPA is at .48 mg/ml, a straight NPA spray would give you .096 mg of pheros and the recommended amount is .03mg of phero. so a 1:2.2 ratio should be fine. Keep in mind, this is only 1 spray! If you use two, you\'ll probably OD. But if your cologne is so strong you can only use one, I guess that what ya gotta do!
BTW, keep in mind that a FULL finger drop of NPA puts out .048 mg of phero. One from the bottle is probably half that.