I set them the other way around...
1st of all, I see that I forgot to mention that this view scheme will only work the way you want if you set it to filter in both directions. While you're in there, adding ~sort=[name],[artist] to step 4 might also be helpful to you.
You should still keep the 'dupes' playlist we made earlier too, as it's referenced by the view scheme. I keep lists I utilise in viewschemes in a playlist group of their own as it helps to keep the tree tidy.
How would I pull any one artist out of that smartlist AND all the other duplicate tracks by different artists?
This is do-able, but you'd kind of need to track your place in the view scheme because the foundation for the view scheme is the [name] field, and you're switching focus from [name] to [artist].
perhaps images would help better here:
I open the view scheme and pick "dupes by name" from the search pane:
This will show all tracks that have the same name, but have different artists. Any tracks that have the same name
and the same artist are not shown.
In the example below, I have a few different versions of "All Along The Watchtower" by Bob Dylan, but none of them are shown.
If I now scroll down and select Rod Stewart in the Artist pane, the results are cropped to just those Rod Stewart tracks from the 'dupes by name' list:
Now, we know that each Rod Stewart track shown has a duplicate by at least one other artist, so pick one. I chose "Forever Young" and the list is reduced to a single track:
To see the duplicates for this track, scroll to the top of the artist pane and select "All"
Finally, changing to the 'dupes by artist' list will show me all the versions of "forever young" by Bob Dylan.
This will only work with filtering in both directions enabled, which can make it a little harder to follow. For example:
If there were no duplicate artist tracks for Forever Young, the list will be empty.
If you start in the artist pane, and select Rod Stewart,
then select the 'dupes by name' entry, the search is run on the rod stewart tracks currently listed, meaning that the Forever Young track in the example would not have been shown.
It's not ideal, but I'm sure if you play with it a bit, you'll soon see what it's doing and be able to quickly arrive at the results you're after.
-marko.