As with most classes, pre/post class set builds are lightyears in difference re: power level. As such, it's almost 100% assuredly faster to farm blood shards w/ t6 rifts on your DH and gear up your barb via Kadala than playing the Barb yourself. Anyhow, this was what I used for t1-3 while I farmed for gear. Reapers wraps helps fill up Fury for more max boulder tosses.
Thank you so much n0n3 for posting this build - I've been looking for something new to try with my WD lately as he was constantly having damage/mana issues, and even without the pet specific gear this build works wonders and I am actually having a pretty easy time with torment now.
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http://us.battle.net/d3/en/calculator/barbarian#bQXkRY!ehjg!cYYZcZ
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