Hey rrnkung1, welcome to pherotalk.
You chose some good products to start out with. Personally for me I did not like mx297 as much as the other ones you have but I will still offer my suggestions.
Depending on what you are doing at work, a314 is usually enough. Ammo might be too strong since it is cologne strength, so it will depend greatly on your work environment.
How old are you? You will want to do some sweet spot testing. Check out this link:
If you are at play, I would suggest testing each individually before you mix all the pheros together. You might find that you like ONLY ammo and mx297 or maybe you like a314 and mx297. But you can even find that all 3 together are just unnecessary. You will do best if you find out which combination of pheromones work best.
One thing that I learned recently was the application of oil and the spray - try to avoid spraying your alcohol based pheros over the oil application since it will mess with the diffusion of the product. So you may apply a314 to your neck and then you will just apply your sprays to your wrists/forearms.
Anyway be sure to do sweet spot testing so you can get some efficient use out of your stuff.