Social non-conformity, and subjective discomfort

How should one prioritize the three primary methods of defining “abnormality” (i.e., statistical abnormality, social non-conformity, and subjective discomfort)? In other words, which is the most valid method? Which is the second most valid method? And which is the third most valid method? Explain why this order is best, and provide a logical rationale for the list.