So I went the last two Sundays.
First Sunday I feel like had a few less people there my order was Clowns then Monsters, skipped Weekend and went to Halloween and Scarecrow and then walked on the Tram and went through Harry Potterland twice and walked on the little coaster in Potterland once and saw Jabbawockeez. Also saw the big scare group that happens every 90 mins and got to see the giant crow walker/got a quick picture in front of the batels motel and Halloween Harry Was out of the park before 10 PM and the longest line was Clowns and only because we got it it early and waited for it to open but even then maybe 30 mins max. Everything else was 15 mins or less.
If I had know it would have been this good would have stayed later and upgraded the passes at 11 pm and had no need for a second night
But since I already have FF passes, I was there last night and started with Monsters (waited maybe 20 mins) and went up to La Lorina and that took maybe ten mins for General as it opened. Then walked on Halloween and Scarecrow, then went back on Halloween with my FF pass. Walked on the tram after for general. Then my GF and I split up and she saw Jabbawockeez and I used my FF pass on Tram to go again.
Then went downstairs and easily the longest line of the night at over 20 mins in the FF line for Clowns, not sure what was up but Clowns had a hugeeeeee backed up line for FF passes. Then walked on the Weekend with the FF pass and enjoyed the rest of the mazes with FF.
Overall the weekend is the only maze you should have an issue with with FF, so if that mazes doesn't interest you. I think by 11 PM on a Thursday or Sunday you can hit basically every other mazes if you time it right but start with Clowns or Monsters and work your way from there.