AI
Just let her do it ... but after about 100 stacks are generated, I pull them (copy and paste into a Stack folder) and look at them ... all this time AI is still running, I don't interrupt. That's the nice thing about the new WH, you can check the stacks while she's still running.
After a certain time (about 40 hrs on my laptop) AI kind of repeats herself in that the stacks are almost duplicates ... that's when I stop, look at the remainder and then reinsert the ones I like. Then I restart her again and repeat the process ... kind of lenghty but I want to stick with it for a while.