A hierarchy of scripture

As I see it, we have a hierarchy of belief in scripture. In other words, we give more authority to certain types of scripture than to others.

Here is how I think we rank it, from most authoritative to least authoritative:
1. Statements acknowledged as directly from the Lord made over the pulpit in General Conference by the current President of the Church
2. Statements made over the pulpit in General Conference by current members of the First Presidency or the Quorum of the Twelve
3. Statements made by Joseph Smith in a church setting
4. The Standard Works
5. Statements made over the pulpit in General Conference
6. Statements made by the current First Presidency or Quorum of the Twelve in a church setting
7. Statements made by Joseph Smith
8. Statements made by former general authorities in general conference
9. Church-related statements made by current general authorities in a non-church setting
10. Books written by general authorities, intended for church audiences
11. Books discussing scripture written by non-ecclesiastically authoritative Mormons (eg. Hugh Nibley, Sidney Sperry, etc.)

What do you think? Are there categories here that shouldn’t be? Are there categories that I missed? Did I get the ordering messed up?