Not my area of expertise. I was one of those guys who had dozens of bottles back in the day and I could never decide what was the right or wrong ones and I just haphazardly threw s*** together. Well, not fully haphazardly, I just never grew through enough cycles to prove one way was better than the other way. Either way it grew well for the most part.
Here's my current sampling:
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Make sure you treat any tap water and get rid of chlorine and chloramine. And you can't bubble out chloramine, you have to treat it via some chemical that you get the fish store or some other filtration system. Don't kill all your beneficial microbes by accident.
I use the vinegar for pH down. It's the cheapest way I could find.
The nutrients were chosen simply because they were the cheapest listed on Amazon for the given category. I wanted calcium magnesium, I wanted PK for flowering, I wanted whatever. So I looked it up on Amazon and found the cheapest.
Make sure you have a decent pH meter, and rest it in distilled water between measurements. It matters.