I would say AMMO as it’s a staple in my book and in the books of many users. It smells great as well. Pull in Instant Shine as well as if I had to choose two it’s IS and AMMO. IS may not be the best on pulling super attraction in terms of it’s affects but it gives off a nice aura and makes you feel good about yourself. When I wear it I feel a great deal of self confidence and assurance and we know how important that is when it comes to approaching and interacting with the women. 
I advise you to read up Toil’s awesome FAQ: Phero Bootcamp located at this link which will explain the main pheros, their effects and which products contain and carry the specific pheromone being discussed, also Toil does a breakdown on products as well :
To sum up my thoughts and voting in terms of choosing if I had to choose a all in one mix to start it’s AMMO hands down. I will add that in with Instant Shine or Instant Female Magic or Instant Openness as they are all staples to have in the arsenal so in the end you may want to get all as that’s what I intend to do, I’m missing IFM and IO.