Step 1 : Leave your mule outside (at Royal Guard stage), Step 2 : Reposition your team and hit the machine at 1,2 & 3. Step 3 : Everyone jump and enter core blaze stage after 1/2 & 3 is deactivated. Once your main characters leaves the laser map without them arming, the laser will not get the opportunity reactivate, and will stay deactivated. Step 4 : move your mules into the map afterwards. In this case, team deactivated 2 & 3 and left the elevator stage. (1 is activated) 2 & 3 didn't get the chance to activate, therefore the result.