What I was doing before my mistking broke (my fault) was working really well for my guys. It was something like this for the longest days of the year (when it's winter and gets dark at like 5 I eliminated one of the middle misting and brought everything up earleir):
7am - Lights on
7:30 - 20 minute misting
11 - 5 minute misting
3 - 5 minute misting
5:30 -15 minute misting
7:30pm - lights out.
I always liked having a very long misitng to start the day and another to finish the day off. I found that none of mine really liked to drink if the mist was on for 30 seconds, since it takes them a minute or two to realize what's going on and realize they want to drink. So my shortest mistings have always been at least 3 minutes long. This schedule kept the humidity up well but allowed everything to dry throughout the day.
Needless to say though, I went through a lot of water. I recommend you make sure you have a way to dispose of the waste water that you know works!