I agree with the papers: Try 120 grit W&D with lots of water to carry away the swarf and keep the cutting surface clean.
What grit waterstone? Waterstone quality varies a lot. Girt hardness, grit quantity, binder hardness, binder/grit proportions.
4-5 years back, I kind of gave up on the Waterstones altogether.
Now I use only W&D sandpapers to 2K grit and don't look for anything else.
Granite stone countertop cutoff for the base for them all.
Many different mandrel diameters for the crooked knives.