He means you'll have to run your own tests at Dr. Boom. Your latency and how that changes can greatly affect which rotation is best for you. Dr. Boom is a goblin in Netherstorm that won't aggro as long as you stay at range, i.e. don't send in your pet. You can test out your damage output with various shot rotations. http://wow.allakhazam.com/db/mob.html?wmob=20284