Love the eyes on your cat. Beautifully glassy.
I do a lot of dogs and horses in my work, and although I've mostly done acrylics lately, for about 30 years I did work exclusively in Prismacolor pencils because they are the most readily available.
My technique is very different from yours. You have worked so diligently at doing the detail that you have practically drawn every hair on that cat!
I'm afraid I don't have that kind of patience. I tend to fill in areas as determined by the value of the color in different areas, and I "suggest" fur or hair, by the direction of my strokes mostly. I only put in a few detailed hairs at the very last layer. With this style, the very sharpest pencils aren't really necessary until the final layer. And it's faster, too.
I'd suggest that you do a more "scribbled" first and second layer, just to cover the paper, and worry about individual hair strokes on the top layers only.
Others may do differently, but this works for me, as I'm lazy about sharpening, and also hate the way it eats up my pencils!