Natural Mixed Media Drawing and Painting: Photoshop Brushes (Bigger Set)
They also include many I have found on the internet (free ones only of course- you may find duplicates of these in other sets around the internet like I did).
Include brushes for crosshatch, dry brush, fav painting, fav sketching, fav smudge, gouache, lino, markers, oil pastel, pastel dry, pen, pencil, shading, splatter and sponges.
Also work in the latest version of Clip Studio Paint
These will work if you import the ABR file into the sub tool palette, you may have to change some settings for stroke spacing and watercolour edge on some of the brushes. Read about how to do that here: http://theartsquirrel.com/wiki/import-photoshop-brushes-into-clip-studio-paint/