I'm sorry but i really don't follow what you're saying.
Can you explain how conscience is an "objective moral faculty"... i don't know what that means. I don't understand what you mean when you say: "it puts the dependency of morality outside of the Self".
In the example i gave (considering another's individuality) one is still morally autonomous, but one acts in the interest of other's in accordance with their preferences. I'm not arguing with you, i just don't see how you can say we should not consider the wants of other's when interacting with them.
I can understand the importance of knowing myself, but what direct logical benefit would this have for other's?
If you have a consummate understanding of yourself, how does necessitate a consummate understanding of others? It's obviously a component of understanding other people, but it in itself isn't enough....
I don't think you really address the issue with the Golden Rule which is that it does not take into account individuality.