Hi CS, unfortunately all of the above you mentioned I do not use for my succulents. Each grower has their preference. For me I just typically use cacti/succulent mix and I add some more perlite and pumice. I have to do that here since I leave most of my succulents outdoors and we get rain in late Fall to early Spring. Well, there is sand in the cacti mix, but it is already there ready mixed. I would not use vermiculite since that holds too much water, and will be bad for succulent roots. Lately I have added stuff to really make my mix very well draining. But basically these three: c&s mix, perlite and pumice works well for my succulents. I don't really like the regular potting mix just because at times it has fertilizer incorporated in it, and these succulents are not that fertilizer hungry, plus it holds too much moisture.
Some people like to combine succulents in a container, some like them stand alone per container, it will be up to your preference. I prefer to use shallow and wide containers, and have good drainage holes. I often watch first for about a month or so and observe the growth habit of the plant, whether it is just mounding, upright or trailing down, that way if I plan to mix them I have a better idea how to arrange them in the container.
