haha :P
I did one run on MT during the recent timewalking. That room we had a ninja pull. We only got two groups but with bonestorm and a few CD (plus trinket with the aoe use effect on it that I had equipped) the mobs got nuked down fast. I think a 3 pull is possible, most likely easier to do a LOS pull and use mass grip to re-position once they are near enough.