I literally use it one time in grit at the start of a raid fight in my static with dark arts to build hate (no ninja) then don't use it again at all the rest of the fight unless grabbing hate on something or its a hate emergency for whatever reason (DPS forgets to pop diversion, didn't use lucid, forgot to shirk etc...). Sometimes as offtank I will precombo up to power slash for it to be ready to dark arts+powerslash the add when it appears and never go into grit.

I can't see a reason you would need to remove it yet, our current skill allotment is the lowest between the tanks. You can also use a L+R half a hotbar if playing with controller.