so last yr i bought 30ml P75 P74 P83 TAA 2.5 mcg thought i was getting the best bang for my buck. boy was i wrong. i got the FF22 i smile fresh but didn’t get the hits. i feel like there’s no pheromones in it. i noted to myself to never get a bigger bottle with less good stuff in it 
Apart from the P75, the rest of those would benefit higher concentrations - I’d suggest 10mcg for each. Otherwise you will be using huge amounts of sprays to cover an effective dose range.
But what were you trying to achieve? All of these are experimental molecules and you do have to accept the risk that they may be entirely ineffective or wholly unsuitable for you.
If you wanted a reasonable chance of results, the consumer line offers much better value with a better warranty and once you have built-up a bit of experience, then you can start using the experimental products in a steering/complementing role.
Yes 2.5 is a low dose. I order all mine in 2.5 for testing purposes and trying 1 spray at a time until I feel the effect. You could try a Togo bottle with a higher dosage so that way if you don’t like what it does you aren’t stuck with a whole 30ml bottle. If you really don’t like what you have you could post in the lounge where people are selling there items.