NIN's new found tanking ability comes from the damage created by Atma's. Personally I use NIN/DNC more often (Unless I'm there for proc's), and I generally find Haste Samba outweighs Provoke in terms of hate generation, and of course a nice increase in DoT for me and other DD's.

Violent Flourish is of course useful too for the potential chance to Stun mobs, but alas there's a chance it will miss, but the chance is nice regardless.