Latest atmosphere/kosmos works, and the new fork neutos. SX works on 9.2 emunand, even if you have an updated sysnand.
If you haven't started using emunand, you can still do it. Create a FULL backup of your nand first (and your keys, while you're at it... use LockpickRCM), and store it on your computer. Store EVERYTHING on your SD, on your computer, in case you want to do a partition-based emunand. You can then boot with Atmosphere/neutos, and use choidujourNX do install fw 9.2. Then create your emunand (sounds like you want to use SX for your emunand creation), then restore your 10.0.1 sysnand.