I post w/ trepidation. Onimaru was insanely kind and patient w/ my ignorance about learning the jnat. I've not mastered the 3-stroke finish and call it good. FWIW, I'd pay attention to his posts on jnats. I do, and will keep doing so.

That said, my flailing about has given me edges I love. I'll either go Nani 8, N12, then very very light slurry w/ Atoma 1.2 on a Nakayama Asagi. Typically about 50 circles (varies) each direction, each side, and dilute in 3-4 stages to clear water. If its extra hollow, I might not go all the way to clear water or I get some harshness.
Alternately, I'll go from a set bevel to a fast coti to the Asagi w/ a heavier slurry and dilute to water. On regular hollows, any harshness is eliminated by 3-6 strokes on the dry stone. Extra hollows have seemed to need more - or I go to a thuringian to smooth it out.