You really only need to flash enough to get into LineageOS recovery, as the full LineageOS image will install everything it needs. If the Pro1 X boots into LineageOS, then you can be confident you didn't skip anything important 😉 Also, 'super_empty.img' isn't needed for the Pro1 X, as it ships with dynamic partitioning. Some devices need to be reconfigured for dynamic partitioning before they can run LineageOS, and that file is used to prepare the device, e.g. https://wiki.lineageos.org/devices/grus/install#installing-a-custom-recovery-using-fastboot