How important/valuable are they?
To druid tanks in particular. I'm just entering Kara, and the resistance greens in the AH have enough stam to keep up with the gear I'd be swapping for them, so they essentially add 20-30 resistance per piece at the cost of defense rating, armor, agility etc. Are there any rules of thumb about the tradeoffs? Seems like for bosses where magical resistance matters enough to bother with a resist set, armor and dodge become less important anyway. Is crit immunity relevant still? Or is that a melee thang? : /
How much +resist makes a set worth a damn?
I've identified five slots where I can replace my primary tanking gear without sacrificing any stamina, nor too much armor. That gets me to around +150. Does every little bit help, and that much would help my healer in a way they'd even notice, or is there some number I should strive for?