For tools and knifes all the Arks could be classified as finishers. Even the Washita's can produce edges that will pass HHT's in the lower end. The stones like the Washita's have a much wider working range than any synthetic stones.
As far as what steels they work with and how I let my experience be my guide.
Are Washita Stones Effective With A-2 and PM-V11 Steels? - YouTube
As far as what steels they work with and how I let my experience be my guide.
Are Washita Stones Effective With A-2 and PM-V11 Steels? - YouTube