I had the best level 10 Brewmaster Monk tank a week or so ago, he had on Heirlooms that were enchanted and all this extra stuff on them. He took NO damage whatsoever. We were in Stratholme main gate and he’s holding aggro and taking less damage than a mythic geared tank would. It was really impressive.
Timewalkings are a crap-shoot. Some you get great groups, others its like that one night stand you didn’t want to go with. You just push thru to get it over with. LOL