Yeah i saw the vids which is part of what sparked my curiosity. Unless i missed it those are all non-northrend instances, and i have been told that DK are stronger from 60 to 70 and kind of level off around 75. I have a horde DK at 79 half way to 80 and i did feel like there was a leveling off in the later levels. That being said DK, from my play experience, are still very strong even later in levels (just not as much as at 60's). Maybe i need to learn to handle them better? I was part of several "all blood DK" instance runs in outlands and that was a blast, but i didn't see them anymore in northrend. Then there was the recent patch with the nerfs and buffs to DK tanking and such.

So, i was wondering, more specifically if anyone has had any luck or theory crafting around DK teams in northrend. My sense would be that x4 + healer would be ok... idk about x5 (though if you can it would be a hoot).