How many Saved Christians have I met in my life who said that they were saved and that there was nothing they could do to stop them from being saved? But then again, your definition of “damned” might be a lot different from mine.
So, is it grace alone, or is it mostly grace and just a little bit of work?
Grace alone. If you are saved by grace, through faith which is not a work but a gift of God, then you will naturally do good to your fellow man in love - the love of God.
Your LDS man-made ordinances or “covenants” have nothing to do with love OR salvation. Christ did what mankind cannot. (I define salvation in the way LDS would define exaltation.)
Have you “damned those to hell” (or the lowest kingdom in your LDS belief) who never have the saving ordinances performed on their behalf?