Actually, I think I would go with this order and because they offer the information one needs; I'll use myself as an example.

1. Duality because it offers both Te and Si in the right dose
2. Activity because it offers both Te and Si in less than the right dose
3. Conflict relations because it offers Te demonstrating (is an ST type)
4. Super-Ego Relations because it offers Si demonstrative (is an ST type to my NF)
5. Identical relations make for a very good friendship.
6. Illusionary Relations, though has many conflicts and is a superficial relations, it offers Si and sometimes roles out Te.