Some inside infos:
I tanked him 3rd time now in 25 man as warrior without kiting:
From tanking him with 5/15/51 spec with glyphed SW/LS, I glyphed same but 15/3/53 spec with imp disciplines instead of malice, with desire to test out "all arround" spec for Ulduar.
Increase in incoming damage without 5/5 imp demo was noticeable, but still far from undoable.
There are 3 things that are simple great in this encounter
Figurine Monarch crab - 1min CD, it's up for each surge
Last stand + heart of iron - Since you are shield walling each 2nd - give your helpers external cooldown helpers little breathing space if their CD fails to come in time... use LS on every 2nd surge opposite to your shield wall.
Expertise - With small panic about tanking him last night with new spec, I went in with full EH gear from Mimiron, and I got squished by General 2 times to arround 5-6% of my HP, then we wiped cuz we lost few people on mark, anyway I checked and I was @ 20ish expertise... :D Well - switched gear arround, went up to 35 and went in... 2 strikes in a rown didn't happen at all... It was noobish to go in with that low but anyway - wanted to share that with other fellow tanks...