Spoiler (click to reveal)
During the game, the investigators nor me understood the clues about what artifacts to use either, but after some research after playing the scenario, we discovered the clues say what you DON'T need. However, after reading through every clue card and story card of the Dark Stranger, we still don't know how they were supposed to figure out what direction to escape from? Is it supposed to be a lucky guess? We did find the card saying north is bad (skull on compass) but other than that I believe we did not find a clear hint.