Here are the attractions open until Midnight;
Mission: SPACE
Spaceship Earth
Test Track
Universe of Energy
Journey into Imagination with Figment
El Rio del Tiempo
Honey I Shrunk the Audience
The Maelstrom
If you want to ride TT or M:S, you need to get in line IMMEDIATELY after Illuminations ends, or wait an hour or so for the crowds to thin out.
The same hold true for MGM on EMH night. Immediately after Fantasmic ends, the lines at ToT and RnR will be huge. Spend your time at other rides for the first 90 minutes or so, and those lines will be much more manageable.