* PS does not show the edits of Capture One 22 in the thumbnail, not even the most basic ones. Therefore I decided to create JPGs for all "good" images after Raw editing. PS should show them as the main version in the version set. While JPG/SRGB is good for screen and Web, it is not sufficient for printing. If I want to print something, I store the image as highres TIF.
* C1 handles Metadata different than PS expects. Therefore I make sure that XMPs are generated that I can use in PS. In addition, I avoid metadata editing in C1 (with the exception of rating) and do the metadata updates in PS later. Once a file is in PS, I will never do any XMP/IPTC edits in C1 again.
* Back and forth between C1 and PS is a nightmare. So I decided to work in C1 from Import to Final Edit and in PS for Cataloging and Searching. Re-Edits is a rare case, but for convenience I keep all session files even after a file is in PS.
The resulting workflow works as follows:
1. For every photo event I create a new session in C1. I import the photes into that session, do the culling and rating and all of the RAW editing. For all "good" photos I create standard exports. Once I am happy (could take weeks or longer

2. I then move the full session (including the session catalog, the caches and edit files from C1) into my picture archive with a file manager, open up PS and search for missing folders, complete tagging and labeling and use automatic versioning to map the exports to the original raw.
3. If - for whatever reason - I need to fine tune images later - I just open the C1 session database that had been copied over an do the edits in C1 (and create new exports if needed). Thus I can re-use my former edits in C1 (because they are stored within the session structure) and do not compromise my archive.
The workflow could be much easier if C1 would offer a single image edit like e.g. CameraRaw from Adobe, but the described workflow seems to work for me right now. I know, I should not move any files withing PS, because that might destroy the C1 session structure, but this is ok for me now.
If you have any ideas to simplify or optimize my workflow, I would be happy to read your suggestions. I probably will use some scripting to automate some tasks and look for quirks in my workflow.