Just to be clear: Open Peripherals + Computercraft does NOT provide a method to empty warded jars. On top of that, Turtles can not mimic shift right clicking. Therefore CPUCraft can not really empty jars.
If you want to void essentia using autonomous activators, however, one unlabeled warded jar + autonomous activator would be enough for all 48 (or more) aspects, right?
whoops, my bad.