I used to use that exact progression. My cerax 1k would delete the 320 scratches with a bit of elbow grease. The problem I found was that both stones are such a mud bath that it’s hard to tell if you actually got rid of the previous scratches. If you have a rust eraser and run it across the bevel it will get rid of the dark Kasumi on bevel and let you see if there are any stray scratches. That was my process until I moved to SG, diamond and chosera. Last little tip… I’d be carful on the muddy soft stones near the shinogi. Just use light pressure on shinogi. They will reach above where a hard stone will and those scratches will be a pain in the ass when you move to higher grits.