Battle stance or Defensive for low lvl warr tanking
Battle stance, charge, now thunderclap to use the rage you just gained. This will put you very low on rage so it's a great time to switch back to defensive.
At the end of a pull, tab through remaining targets and check omen. As long as you have a threat lead, just auto attack for rage. On the next pull, if you have rage just stay in defensive. If for any reason you are low on rage, stance dance again.
"he doens't need healing, he doesn't need healing, he doesn't nee-WHAOSHIT!wtf was that man!". Please stop leaning on TDR. -Teng