The Blair Wisp Project assignment is a lot of fun when you know the tricks. This is a tricky assignment, so read the whole thing first!
This Blair Wisp Project Walkthrough will take you through the entire assignment as well as revisits.
The first thing to look at in our walkthrough is the layout of the assignment, including the important locations.
1. Harriet goes next to the campfire where Sparkle is bound.
2. Blair Wisp is bound to the altar. Bind Whisperwind near the altar.
3. Bind Stonewall near the base of the tree.
4. Location of the Darkling & Moonscream.
To clear the fog from the island you should also be able to use Weatherwitch or Aether. However, we have found that sometimes the fog will clear and sometimes it won't. The only way we've found so far that always works is to use Whisperwind & Tempest. Also note that the video cut scenes for the basement sometimes run at the same time. This means you'll see more than one cut scene fighting with the other for the foreground. It passes just fine.
To free Sparkle, simply bind Harriet near the campfire and have her use Ethereal Gift. Then bind Firetail to the Gift and have him use Bonfire. After Sparkle is free, bench them. Once Sparkle is free, use Stonewall to knock down the tree. While that is happening, click the Darkling in the basement. When the tree is down, bench Stonewall.
Bind Whisperwind on the island, preferably near the altar. Use Tempest. Once the fog is clear, bench Whisperwind and have the Blair Wisp use only Hypnotic Image. While the Blair Wisp is freed as soon as someone sees it, you have to be fast. The moment that Wisp is free, bind Fingers to the altar and use Unearthly Calm. If you have trouble clearing the fog, you may need to have Weatherwitch use Gusts. It seems to depend on how Ghost Master is feeling at the time.
With the tree down, bind Blue Murder to the tree stump and have her use Obsession. Keep Fingers on the altar using only Unearthly Calrm. You must keep them calm or they cannot cross onto the island. Once the last person has crossed onto the island, have the Darkling use Obsession. This will draw them across the tree and right into the basement. If you haven't freed Moonscream, be on your toes. It's coming.
You only have a few seconds between when people begin entering the basement and the cut scene starting. You need to have Moonscream use Spooky Surprise and be seen by someone.
Once people are crossing the tree under Obsession from the Darkling, it's only a matter of time until the cut scene starts. There isn't really anything to stop them from reaching the basement and starting the ritual.
If you are on a revisit or you have not previously freed Moonscream, you'll have to be quick on your toes to catch the chance as people pass her grave after they have entered the basement.
And as long as the tree is down and people are calm, remember that all you need to do is lead people with Obsession and keep them calm with Unearthly Calm so that they can pass the island.
The walkthrough above should easily enable you to get the Triple Jack-O-Lantern Scare Rating. It may take practice to get the timing and speed right, but together it will do the trick.