C-c C-k unfolds archived headings. I am using it/interpreting it as a subtree variant to S-TAB, which shows the CONTENTS headlines only view without unfolding archived headings.
Emacs : GNU Emacs 25.3.1 (x86_64-pc-linux-gnu, GTK+ Version 3.22.26) of 2017-12-04 Package: Org mode version 9.1.6 (9.1.6-10-g0c9329-elpaplus @ /home/ionasal/.emacs.d/elpa/org-plus-contrib-20180108/)
