Hi and welcome to the forum!
I’m glad to hear that you’ve already had some initial results. I havent used heavy ammo, but it might be a good idea to try just 1 spray, since its already the more concentrated version, and more pheromones is not always better. Steve has an excellent forum on finding the right amount to use, found here .
As you mentioned your difficulties with an “ice-breaker” line, I think we have your answer here too! Instant Openness is considered just that…an ice breaker. Its excellent for helping with small talk. Also, since you already have some Instant Honesty, you might think about giving it a go! Its not solely intended to have everyone pour out their secrets and/or problems on you; its also pretty good with intimacy and trust.
Im not sure if sweating reduces the duration of your effects, but the bacteria on your skin from it can actually convert some types of pheromones into others. For example, A-1 breaks down to Androstenol, and then to Androstenone. Thats why sweating is something to try and avoid with the products. Sometimes its something you cant help, but it will alter your results in unforeseen ways, since you might not know which pheromone you ended up with! 
Time limit-most last around the 5 or 6 hour mark, give or take depending on the product. You definitely dont want to reapply during that window, unless you have good reason to believe you didnt apply enough to get effects. Still, for purposes of consistency, I personally would wait. After that though, its generally safe to reapply.
I hope you can find what works best for you, and I will help you as much as I can. That being said, we’re a very friendly community, and just about everyone here will lend a tip or two.
And out of curiosity, have you considered any more androstenone based products, like TUTH or IJ? Why or why not?
-Glad to have you, by the way. 