Things I have used but don't would be a diamond hone for initial bevel setting, I found that when I did that my 8 K edge was very chippy and I went back and forth between my 4K and 8K for a long time before it was resolved. I spend a little more time with the 1K and life is more simple.
I have several finish hones that don't get much love. My norton 1K has been a dust collector since I got my Chosera. Most of the stuff I have gets regular use, except I have far too many razors to rotate them all, in part because I change razors once a week for the most part. I have about 20 that are my favourites and everything else sees very little love.