MaM and Geek and some other sites post a weekly 0-Day dump from the comic usenet boards.
So every week, all the comics for the week a dropped in one bundle. “0-Day Week” is what they’re called.
Make an feed in your usenet/torrent/autobrr client to auto dl these weekly packs. Then in mylar add it to the folder-monitor.
To “quickly” (processing takes a while) jumpstart a collection go to MaM and download entire years worth of comics and have mylar import them all.
Please use MaM as having seeders is really important for all these comics.
Have you tried dc++? Everyone was there back then and everyone is still there now. Basically it’s the best ever place for getting comics, 0day or some obscure 20 yo scans.