In my idea, your build must depend on stats and gears you have. With 1.2mil DPS (after buffed), 26mil toughnes and IK set, I'm quite happy with my build as linked below. I can solo T6 with small issue sometimes dealing with crazy elite pack. Group... depends on members. 
Barbarian - Game Guide - Diablo III
Note: With new IK full set (Call of the Ancients/Ancients' Fury), you don't need any more fury booster. And, please pay attention to the elemental damage bonus. I'm having 39% physical damage bonus (still looking for the Doombringer) and all of my skills are... PHYSICAL.
Barbarian - Game Guide - Diablo III
Note: With new IK full set (Call of the Ancients/Ancients' Fury), you don't need any more fury booster. And, please pay attention to the elemental damage bonus. I'm having 39% physical damage bonus (still looking for the Doombringer) and all of my skills are... PHYSICAL.
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