ah the same old question found in ANY forum.
(and I just keep saving all those threads)
Anyway, and seeing things with the eyes of a RedCross certified person, you have two ways to go.
Assemble a kit yourself with all the staff YOU know how to use.
Assemnle a kit with everything a doctor could use. (You won't BELIEVE that most doctors do not carry any in their car amd trips outdoors)
Maybe there is a reason to it, and that is that KNOWLEDGE is more important than materials. That we were instructed in the classes I took. You can always improvise. You can never carry all that staff with you. (My all possibles bag is about 20lbs+)
So there is a better way to find out the proper kit especially when all the prepackaged ones are always lacking something. Get some red cross civilians' first aid trtaining and you'll find the answer. (then you'll spent some 100s on proper gear LOL LOL, and find some more reasons to buy flashlights!)
BTW. it is not reassuring to have only one person at home trained (dear fellow member what happens if your nurse wife faints?). For this reason, I managed to get my mother and sister trained.
Best of luck, kostas