Create an action of the type "import tag fields" or "Guess values"
Enter as mask:
%dummy% - %artist% - %title%
or if you want to import the leading number as track number:
%track% - %artist% - %title%
Actually, "my" solution (it's more of a suggestion, I would like to humbly point out) only works with tag fields.
If you want to import that data from a filename, then you could use the converter filename-tag and the mask
%dummy% - %artist% - %title% Various Artists
But as the op sort of created a kind of table which assigned the "Various Artists" to ARTIST, I thought that he actually had the data in the tags...
Let's see.
Now you have to help me a little:
Where do you get stuck?
I mean, the instructions how to create a new action are pretty straight forward, I doubt that a repetition would express it any clearer.