Having put the examples side by side I think using multiple techniques would lack cohesion. Also I didn’t like the ‘feel’ of the heavily inked monoprints and for a book I think the feel is important.
So now I’m thinking of mainly using acrylics and adding the text and some details with gum arabic transfer. Using modern materials works with the concept of the book, and, considering the number of pages I’ll need to do, the drying times compared with multiple layers of oil based inks seems like a good option.
I can incorporate both painting and monoprint with this. I can also add an element of mixed media into the images if it seems right.