to keep emunand, just don't clone it to sysnand and don't remove it from the SD card. also you don't need Cubic Ninja or any exploit games at all.So how am I supposed to do that without Cubic Ninja and will I be able to update the EmuNAND like I do with Gateway? Also, how do I keep my existing EmuNAND? That's the BIGGEST problem.
https://github.com/Plailect/Guide/wiki/Part-2-(Downgrading)