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For the amounts to add. Elemental sulphurs are all similar so something close to those listed will work.
I don’t count my spinosads, but when I look at my past logs its nearly always less than 6 without thinking about it. 4, 6, 8, something like that is good. 12 is bad.
In most conditions so-called sulphur sensitivities don’t happen, my view is it depends a lot on conditions. I just use best effort to avoid. Apricots they say never use sulphur on, it will kill the tree, etc, but I sprayed a lot of sulphur on mine and it didn’t make a lot of difference. I similarly sprayed many grapes supposedly sulphur sensitive and generally noticed nothing.
I use horticultural soap as I have a 2.5 gallon container of it (its my main control for aphids). I use around 1/2-1tsp per gallon, this is much less than the standard 3tbsp/gallon rate.