lol I've had this ability, lost it, regained it, now I'm gonna lose it again. It actually used to be part of the base spell in beta, they removed it, added it back as a glyph, now it's going away again.
As for my replacement, I'm kinda torn between icy touch glyph, since they're removing the damage reduction, and maybe the blood strike glyph. I'm leaning towards blood strike.
I've been using AMS/IBF/SS. SS is nice in random PvP when it procs, even though it doesn't proc Desecration. Mainly because I'm lazy and like just beating on people with SS/BS/DC.
I have no idea what I'll replace it with. It was by far my favorite glyph in the entire game. It was 100% mitigation on almost every pull, especially if there was another DK in the group/raid. I wish they'd add new glyphs, weren't there supposed to be glyphs for every ability in the game?