As one of the best dk on my server and as a french (sorry for my english), i can tell you this :



If you dont lose hate or take big damage (Need work on CD and healing) dont put grit.

Also on trash mob its hard to remove grit because of the damage and the hate (you need to look the groups hate on many mob).


Im always removing grit on boss in dungeons/ 24 raid/ normal creator, in savage i remove grit after the pull, except a12s