I had this same dilemma with my main char, a frenzy barba
At first I used Grief + Lawbringer, then I found Azure and it paired better with grief (and dracs gloves), faster kill rate.
After a while I aquired a Lo and made another Grief which is really faster than any other combo.Just use Berserk for phys immunes, the speed at which you kill with 2 griefs far outewighs anytyhing else.
Until you make another Grief, Azure is great!