Wow, this has also been a pretty complex discussion. The answer to this question, once again, in my humble opinion, is very simple. Ask God. Pray to Him and ask Him. Come prepared with exactly what you want to know and then "work" out the answer for yourself.
I have done this. I know it works. And when I see discussions of "faith vs. works" my immediate reaction is to jump in on the debate/discussion/sometimes an argument and "prove my point" by quoting scriptures, using analogies, etc.
Now, however, I have a more tempered reaction. I realize that this question is more simply understood when it is asked to Heavenly Father.
I know, my answers are sometimes too simple; however, I strongly believe that this is how God wants us to understand His doctrines and teachings.
Try praying and asking God yourself. Expect an answer. Do not let personal predispositions or bias interfere and you will be surprised at the inspiration, insight, and spiritual clarity The Holy Ghost will provide.