Stacked pulleys can get you into trouble. Best to discuss your plans with Rob before making a lot of purchases.
Two things you need to add to your list is the Needswings pulley saver kit and a scatter shield for the pulley.
Aluminum pulleys have been know to explode causing a lot of damage.
Here is a link to a very long thread. Read post # 78, 79 and see the chart at post 81 pulley info
Good Luck