On DRK, in dungeons, I use: Provoke, Reprisal, Anticipation, Rampart, Low Blow.

On DRK, in endgame, I use: Provoke, Reprisal, Anticipation, Rampart, Shirk.

I think it's pretty safe to say that you will ALWAYS want: Provoke and Rampart. The remaining three are interchanged depending upon what you'll be fighting.