Need some advice (heroic/raid) tank
So Ive been searching all over the net and asking all kinds of people about my spec and gear. Im the MT for the guild and want to better myself of course but not sure how to go about it. Right now, im in pretty much crafted items with 25.3k HP, 23k AC, and Defense rating is at 560ish. I know 540 is cap but I have a few blues I will need to upgrade eventually and will most likely take a hit in Defense rating. I need some help on how to go about progressing. Im a heavy frost build and it seems to work fine for now, but everyone keeps telling me I wont cut it even for heroics. Feedback would be greatly appreciated!
The World of Warcraft Armory