Thanks for the suggestion, but it seems like the challenges with Komga would be similar to those when using Mylar. I'll probably just go for a spreadsheet.
That was my first idea too, but last I checked it didn't scrape much other than English editions (using Comicvine AFAIR) and had no way of manually adding stuff it can't scrape.
Of course he listens to Slayer. Why else would this photo of God and Tom Araya exist?