Hey, Just got to nightmare, not sure how defensive I actually will have to get, but im trying to strike a good balance and just go at packs with a little caution. One thing I was having a hard time deciding on was whether to use HotA or Rend, but I figured I already had a couple AOE (cleave/Revenge) and would need something to deal with elite packs and champions.
http://us.battle.net/d3/en/calculator/barbarian#bZXVYP!ZVY!ZZaaba
I guess in the end it will either work or won't, let me know what you guys think.