Now I've got my harbi on 62 lvl, being in act 4 on legendary

about 6500 DPS without Onslaught and Dual Wield. One of DW skills is activating more often than every second attack, so real DPS is much higher! I'm still looking for Pendant of Immortal Rage
I have got one more question connected with my build.
Here it is:
http://www.titancalc.com/TitanCalc.a...-0-0-6-0-0-0-0
What skill should I get next? Ancestral Horn? War Horn? Battle Rage tree?