Just finished this damned thing today.
Took me roughly 8 hours with the mimic head, rapier, ring + and coin. My luck was at 70 by the time I finished, I didn't really keep count but I think I managed around 5-6m souls out of the ordeal.
Oh, btw don't try the magic one that mentioned above, just go with the build you are most comfortable with. Also recommend farm for the pale tongues to put more points to luck if you needed it.
Wish me luck, next stop the mound maker