Tim Convinced me I needed this and glad I bought it
Tim said ink pads were NOT meant to be smunched the heck out of to get ink.
I like to smunch Distress pads both regular and oxide on a piece of acetate and then add water and dip on my projects. I now am using spray the acetate and add water and find the looks to be better and more dramatic.
I also think that when laying the Oxide sprays you should add a layer of the color of ink sprays in another color to get the best looks. (Also a suggestion from Tim).
I don't know that you need 60 colors, but a good cross section of color families will probably do. The ones you use rarely, just smunch the ink pads in my opinion.