How to handle Artist and Albumartist

[aliasname]

Album.displayFormat={$album$artist$date}

More or less. I'm again stuck @ something which I can't get solved.

Had this one:
album.displayFormat={$album^$albumsubtitle^ [^] $albumversion^ <^ $releaseyear^^>}
so i get my albums in the following represenations
Title [Best of] <Remaster 2016>
Title [Best of]
Title <Remaster 2016>
well I though so ... what I wasn't albe to solve is how to prevent printing the releaseyear which is only needed in case albumversion does exist.
Sort of passing the releaseyear into the albumversionsuffix.
But it was obvious this won't work using the $ in front of releaseyear since that prevents it being a suffer nor would it work removing the $ in front of it since then it'll simply print 'relaeseyear. Any idea? On how to put a framecontent into a prefix or suffix of another tag-name?