If you don't mind having a bit of a long evening you can see all the nighttime shows if you can follow the schedule below:
8:00 World of Color (this is the one you can't control unless you pre-order a picnic or dinner package)
Then head immediately to the
Disneyland gates so you get to Main Street for
8:45 Remember Dreams Come True
(You'll most likely be at the second rope line down Main Street if the last couple of weekends are any indication)
At this point you can either try for F! straight away (9:05) or go with the safer play if you can stay until ~10:45:
Head through Tomorrowland to It's A Small World, you've got about 30 minutes to do this for:
9:30 - The Magic, The Memories, And The You
It's a fun show and it's short with an extra little bonus at the end. Consider it like an amuse-bouche in this meal of Disney. It's about 11 minutes long.
That gives just enough of a time for the 9:05 showing of F! to clear so you can go to Rivers of America for:
10:15 - Fantasmic!
And you've completed the Disney Circuit. I've done this twice now, once starting from WoC Red and the other from Blue. From Red it's a tight time to Main St, Blue is noticeably easier. You can stay until the fountains go off fully after the post show and not have issues.
Once you get past the fireworks it's all easy from there because a large part of the crowd from Main Street heads for F! and (at least so far) very few people head for TMTMAY's 2nd showing (On Saturday I counted 34 people in the show's prime viewing area).
It's 2km total walking (just under a mile) and it'll work as long as they keep 20 minutes between shows and TMTMAY's 2nd show remains so deserted.
Good luck and enjoy the parks!
-Joe Kavanagh