My go-to route last year was.....
Early Entry- Exorcist, AHS, Krampus, FvsJ, Halloween, TCM, Purge, TWD, Terror Tram...
Granted... IF there was practically no line, I would hit Exorcist again before heading to the metro sets. When on the backlot, after one trip through those 3, depending on the waittimes, I'd hit them up one or two more times. When it came to Halloween, if there was no wait, I'd try to do that a 2nd time as well before heading back to the Upper Lot. TCM would usually only get one trip through, but if the waittime was already high, I usually just saved it for later.
I save the Terror Tram for when the everything else has a long wait & it does not.