I've got Heroic Iron Docks and Auchindoun down. Running a mixed team. Pally tank, Mage, lock, hunter and priest. Tank is at 639, rest are 615 to 620. Definitely big jumps in dips/survivability with small iLvl increases.

Tried Heroic UBRS. First boss was easy, but how did you get past the poison from the second boss? Room was covered with it in about a minute. No where to go and too much movement. Got him down to 30% or so.

Going to try farming 670 gear. That looked like a lot of fun.