I completed the 10 mover! The solution was D L F' B2 D U' L' F2 D B2, so the scramble B2 D' F2 L U D' B2 F L' D'. Up to 9 move scrambles, I just looked intuitively what could possibly work until something did, but here that didn't really work so I tried FMC techniques. D L F' was a simple EO, and then I guess B2 D U' L' is DR but I didn't find it that way because I don't really do FMC. Instead, I found that after EO, D U' L F2 D B2 leaves 3 edges, and then I found an insertion that added one move somehow. It was a bit of a mess trying to figure it all out on my phone lol but hey I got it to work ig
Maybe FMC is fun after all?