I am not sure if I am the only one but our Glyphs are not game changing.
Unlike Warriors they get damage increase, CD reduction, and Increase duration glyphs.
Our only game changer glyph is Adrenaline Rush and Deadly Momentum.
Some ideas I had
Glyph of blade flurry:
Increases number of targets you hit by 1
Glyph of Killing Spree (Major):
Your Killing Spree now only attacks one target but your damage is reduced by 30% during it.
Glyph of Dispatch: Your mutilate no longer has a chance to proc dispatch but the damage of dispatch has been increased by 50%.