Is it only me or does it seems very complex actually finishing this quest in 4 players due to the sheer amount of turns one has necessarily to spend (from my account at the bare minimum you need is 16 turns: 2 for the first stage, 12 for the second stage and again 2 for the third) finishing it? Sure the Clues can reduce by 3 that number but it's still a very long quest, one of the longest ever, and without low starting threat and/or a lot of threat reduction you are basically doomed (and that's without considering what happens if you get the Sauron Worship Plot).
Sure also in solo it could take a while, but you can manage to handle the lack of locations to explore somehow with encounter deck scrying and manipulation (one of the quest where A Shadow of the Past might actually shine I guess) and by fishing out locations from the encounter deck, but in 4 players there is, to my knowledge, no easy way around to the "1 active location explored each turn" limit.