Guardians first, Test Track second, then keep moving
Guardians of the Galaxy: Cosmic Rewind holds in the 60s and 70s until it peaks in the evening, so it's the first standby line of the morning. Test Track is right next door and typically runs 70 to 75 min once the park fills, so it's the second stop, not an afterthought. By the time you reach Soarin' Across America and Spaceship Earth, Soarin' has hit its afternoon plateau and Spaceship Earth its small late-morning bump. Neither climbs from there, so bank them on your way to World Showcase.