Excluding Nyaa or private trackers, as many ongoing and more obscure titles aren’t available to torrent. I’ve been using Comick and Weeb Central, but I don’t really know how up to date they are on new scanlations as I think they’re mostly aggregating from other sources?
Do you know if any tachi forks have bulk migration? I’m on aniyomi and it only support migrating individual titles. Given entire manga sites can collapse overnight, bulk migration is becoming an important feature.
TachiJ2K is the fork that debut bulk migration, and, while relatively inactive, it’s technically still maintained. It’s very much feature complete though, so I wouldn’t much about it not being super maintained.
Personally, I’ve been using Yokai, it’s basically J2K, but actively maintained and getting feature updates.
There are other options but tachiyomiSY has that if you want