Finding what layouts work for you is a time consuming thing and can be costly. I read a great article in BTM about setting up an arsenal. Well one of the guys view on setting up an arsenal goes like this.
For a 6 ball arsenal use 2 different layouts.
SET 1: A ball for heavy, med and light oil all drilled with a power stacked layout for when more hook and power on the back end is needed.
SET 2: A ball for heavy, med and light oil all drilled with a lable layout for when more control is needed.