I've described it before, but here is again the 10,000 foot view of the steps in my "top-down" process...
1) Use bulk downloader on multiple sites to download pics for the character.
2) Dump them all in one folder.
3) Remove video files, GIF files, etc.
4) Use VisiPics as a first-pass for de-duping the mass.
5) Use Awesome Duplicate Finder as a second pass.
6) Often at this point use the Advanced Renamer to generic the file names.
7) Do a visual pass through the files in Windows to remove any pics that are obviously not suitable for a pack. B&W, pics that are not of the expected character, etc.
8) Run the mass through the BK tool. After this I have a pack.
9) Build the INI file.
10) Duplicate the pack to keep a copy of it for later editing.
11) Use XnConvert to convert all the pack images to WEBP format.
12) Zip up the pack. Upload it to Mega. Select a face image to put in the same Mega directory for reference.
13) Announce the pack, including a couple of sexy, but not nude or overtly sexual, images to go with the post. The pic selection criteria are just my preferences for how I like to illustrate packs.