i believe the purpose of PiP BOOBS JOB was to insure that the character you want is always pulled to the currently active region by hitting the same key every time

this way, you don't have to know where the character is, it'll come to your current region

personally, i use the F8-F12 keys... this allows me to quickly pull the character i want as the 4 keys next to each other maps well to a 4 stack on the right

as for which is the best character to make lead next.. that's a different problem... and would make for a good wow add-on.