I usually get all the pulley bolts finger tight, then i tighten the belt tension on AC pump first and then the PS pump last. I don't have a tensioning bracket for the alternator so i just have a helper lift up on the alternator while i tighten the bolt. Then i go through and tighten all the pulley bolts. I have taken the pulley off my car 5 or 6 times for changing the timing belt and replacing the timing cover and replacing the Coolant pump. This method has worked fine for me.