Adobe Portfolio workflow when working with multiple LRC catalogs that include large files?

See Portfolio Help article about integration with Lightroom CC, Lightroom Mobile and Lightroom Web.

https://help.myportfolio.com/hc/en-us/articles/360036720853-How-the-Lightroom-integration-works

You can create as many Albums as you wish (500 images max per Album/PhotoGrid page).  Although I recommend using far less than that to ensure faster page loads.   Site visitors have the attention span of a goldfish.  They won't tolerate slow loading web pages, especially if they're on slower mobile data plans. 

For #5 'In the LRC '4 Porfolio' catalog, organize images by collections'

        Here are LRC and LR set up to match:

Since no one asked, I thought I would update my progress 🙂 

Regarding step #6 ‘Sync LRC with LR’

After much frustration, I watched this excellent youtube vid:

Photography Masterclass | Keeping Everything In Sync - Desktop, Cloud, and Mobile

and learned:

LRC Collections =  LR albums

LRC collection sets = LR folders. 

       These file structures do not sync.  Only Collections  / albums sync.

So you must manually recreate your ‘folder’ structures in LRC and LR so that they match.

Its okay to drag your LR albums that are now LRC collections from the “From Lightroom’ Collection Set in LRC after sync.  

( I guess the UX department was on vacation - I mean seriously)

https://youtu.be/1Xniwcrv53c?t=2460

Regarding #6a

LRC only syncs smart previews up to LR and then Portfolio so no worry about the size of files.

Also note that for pics taken on your phone, LRC / LR sync will download the original sized files to LRC.  You can choose where to store them in LRC preferences.

The Lightroom Classic catalog should not slow down based upon the amount of information in it (exception: making backups will be slower the more you put information into it). If I had to list the top 25 reasons for slowness in LrC, catalog size is not on the list. All the steps you go through seem unnecessary to me. The trick is to indentify the cause of slowness.

Please tell us what actions are slow in your LrC (and be specific). Some actions require faster CPU or faster GPU, other actions require faster disk, other problems could be driven by the video driver or the phase of the moon.