I recommend that you try each on their own, so you can feel for them individually. Then get into mixing.
They’re best applied to wrists, top of hands, behind the neck, behind the ears, on the neck and chest (not saying to use all these areas at once – in fact, start with just 1 or 2 sprays).
I wouldn’t apply IFM near your own nose, though. While it’s almost magic on women, most guys don’t respond well to it at first (including the wearer). You’ll get used to the effect over time, but until then, the closest you should go to your own nose with IFM is application to the back of the neck.
Also, what do you want to do (effect-wise), whom to do want to do it to (age, sex, genetics), and where do you want to do it (venue)?