I think the only way you could get away with running a heavy machine gun on crotas end, is if you were the sword bearer. But for that to happen 90 percent of teams would like you to be a hunter. Trust me on this one. It makes a difference lol. And that's coming from a warlock.
And 100 percent of teams would not let a 31 run sword if they were serious about completing it. As far as I'm aware anyway. I'm only going by what Ive seen.