How good are brewmasters sitting in terms of survivability? I play a Mistweaver as main spec and have seen many Brewmasters in LFR/5 mans and our main heroic 25 raiding group uses a Brewmaster tank and I always see them get absolutely wrecked on big pulls and some bosses. Is there just some finesse to the class that some just aren't understanding or are they going to get hit like a truck almost all the time? I've seen our tank pull the trash before Shek'zeer on 25N and watch him get one shot almost instantly. I haven't seen an amazing Brewmaster at all yet. I've seen decent ones that can hold their own for a bit until they just get hit down to ~20% out of nowhere, so I was wondering if any experienced tanks could enlighten me on why they get hit so hard.
I am 110% aware they can do amazing DPS as a tank, that isn't relevant to my questions. Not trying to be a dick, but almost every Brewmaster only brags about his/her DPS instead of trying to survive in fights.