Had a level 75 BST help me. It still took about 2 minutes. At level 46 the rotten meat mobs would aggro me even though they are DC to me.
And the ??? are not the ones behind the shed like pic shown above. It's further up the left side of the wall.
Interestingly after defeating the ghost a miner ran to the ??? and pick axed it. I don't know if it was some weak attempt at an MPK or what. Since being a miner knowing the point gives no items and since the patch wouldn't it be useless to try to even MPK?
I did find a mining point on the way and got Darksteel ore... easiest 40k I made in 5 seconds.