Getting into Tank Theorycraft?
My main is a lock, and it's what I've done since well before AQ. Since Cata, I've gotten into tanking and healing a lot as well, though mostly tanking. I co-GM a guild on my blood DK, tank on my druid some, and tank on my paladin. I know a lot of the tools, such as SimCraft, for getting into some of the theorycrafting and figuring out how to best do my stuff on my warlock. However, I'm very curious as to where/how to start with tanking?
I'm mostly concerned with my DK and druid for tanking, because I'm not sure how to figure out what is actually best for me to do, etc. For example, how do I find out what the value of stamina is compared to mastery for my DK? How do I find out how much better it would be do gem all dodge/agility vs. stamina/mastery on my druid or find out what the relative values of either of those are, etc.? I understand how tanking works, just not how to really optimize my characters as much.