I'm not sure you can say that 6 is a logical deduction of 1 and 2 absent a definition of 'experience', and an explanation of how that word relates to 'feeling'.
If 6 held that "Any non-painful feeling is a pleasure" it would be a deductive conclusion of 1 and 2.
That feelings are discrete does not necessarily mean that experiences are; they could be composites of multiple feelings. I just think the word experience is over-broad for this kind of thing.
"How was your week in Paris?"
"Oh, it was a wonderful experience!"