Here's what I would do:
Arrive at the gates no later than 6:15 (FOL has a special priority entrance to the park, which puts them in the very front for the Opening Scare-a-mony...at least it did last year).
Go down to the lower lot and go to Insidious first, then Walking Dead, then This is the End 3D. Since you're seeing the Opening Scare-a-mony, the early entry people will have an advantage over you. That being said, the lines at that point might be 20-30 mins. If the wait times for any of those 3 mazes are longer than 40 mins, I would use your FOL and come back later for stand-by. Otherwise, wait in the stand-by line and use your FOL later.
After that, head to the backlot and hit AVP, then Crimson Peak. Again, if the wait is over 40 mins, use your FOL and come back later to wait in stand-by. Then head to the Upper Lot.
Once you're in the Upper Lot, go to Halloween (again, use FOL if over 40 mins). Then go to the Terror Tram (shouldn't be longer than a 15 min wait at this point). For Terror Tram, keep in mind that it closes at 11:15 on Sundays. Then, if you're interested, go see Jabbawockeez. Because you have FOL, you have priority seating. However, I would still recommend arriving at least 20 mins early for it, since it will probably fill up very quickly.
After that, I would go around and repeat any mazes/attractions you choose to do again. I would keep hhnwaittimes.com open on your phone for reference throughout the night. That way you'll know where to go next.
Chainsaw Chaseout starts at 1:30am, and the park closes at 2am.
Hope that helps! Have an awesome time!