First, I'm not a "pro" barb player , but I'll try to give you some help.
Currently, there are no pure reaver barbarians. If there are , then these players have insane skill and they dont die a lot. Hybrid specs are what's common nowadays in PvP. Example
http://joharaoc.eu/feat?link=v9_1126...db641d71a1e84c If you already noticed , it has a degree into Bone Shatter combo. As we have Lashing Swords feat , you can jump around doing this combo and hitting almost everyone. Also I think that with Hammer and Anvil feat you can deliver pretty good damage on clothies. AM + Haste is just like a speedhack if you can perform combojump
Of course , you can disagree with me hehe. However, try to ask some people on Fury/Rage. A lot of good barbs play on these servers.