I realize I can circumvent this by going through Anvil Rock and Deldrimor Bowl to reach Beacon's Perch. There should be at least one zone in GW called Witt's End.

I'm curious about some game statistics that may or may not be available.
What is a fair number of tries through a mission before giving up? What are my alternatives excluding avoiding the mission? Please don't throw a lot of abreviations at me because I am a Newbie and I'm Solo. I haven't worked at all with any group or guild. If you do please define them so I can learn what they are and how they are used. Thanks.
How many play through Prophecy solo+henchman successfully? I've heard that Factions and Nightfall are easier to play solo+heroes which is fine by me as the game has enough challenges in it for a real adventurer who gets tired of nothing but hack & slash challenges some time.
How many Prophecy games sold are actually finished in any manner? I'm going to guess at this point based on my skills still being above average that the number is very very low. This is not a gripe at the game...just a curiosity and besides, I don't think anyone really knows. Although, GW is online only so ArenaNet would know.
Thanks.