Originally entered as MBS-2079 but I'm creating a new ticket because that one is a mess since so many people confused it with the ticket for being able to link works for a particular release.

I there should be something like
"Create/add to work"
just below
"Add selected records for merging"
(on the "Artist's Recordings" Page).

So you could select some recordings, click this button,
select one of the recordings works (if there is any,
otherwise create a new work (with suggested name))
and add all these recordings to the work at once.

There are lots of cases, where one (or a few) of
many recordings have a work now (because
they had a composer before migration to NGS)
and all these recordings should be assigned to this work.

http://userscripts.org/scripts/show/119544 provides similar functionality.