It looks like I am clocking out. However סוף דבר הכל נשמע את האלוהים ירא ואץ מצוותיו שמור כי זה כל האדם The end of all things, after everything has been heard,, Fear God and keep his commandments, for that is all of a man.  Which in itself seems to indicate the importance of the path of the Gra-that of straight Torah.

Sadly I was not able to stick with this but I still can recognize its importance. 

But you can ask if Fear of God is the main thing, then why not emphasize Musar? The answer is I think there is a limit of how much Musar can help. That is the Law of Limited Returns. Probably it is best to concentrate on Gemara, Tosphot and the Avi Ezri of Rav Shach.