25k, 50k crits, you'd only need 2 crits of 5 to kill one of these 170k golems.
Again, you 25 man raiders don't know what's going on in 10 man.
More edits: We don't even use tank pets in 10 because most of the time we're providing some buff we need, and need the ferocity DPS. I just face tank it with my face, and don't do anything that would get it on my pet. Keep in mind, in 10 man, everyone including healers need to tank a mob (in 25 I believe you have 2 free healers since the tanks get 2 each), and you're rarely in range of more than one healer.