Change Tag fields using filename with hyphens

Hello,
I have hundreds of files with the following file name format:
Artist - Album - Title

For some files, I do have the Artist and Album tags. I would like to set the Title tag in the following format: Artist - Title
I would want to set the Title tag in the above described format (Artist - Title) and be able to do so without affecting the existing Artist and Album

Also,
lots of files do not have any tags. For these cases, I would like to set tags as follows:
Artist tag format: Artist
Album tag format: Artist - Album
Title tag format: Artist - Title

Any help would be appreciated!
Thanks in Advance.
Daamay.

See the action type Format value.