^It's true Demon rarely has a line during the week. On Saturdays the line gets up to 1 1/2 hours long. On Sundays probably like 45 minutes.
Definately do Invertigo in the morning because by the mid-day, it has the longest wait time because of the one train. And IMO, since their is Mad Mouse in Valleyfair, to save time, you could skip Psycho Mouse due to the fact that they are exactly the same thing.