With chapter 90 having been released, we have just reached the end of arc 6. Translations pre Chapter 80 can be found on https://witchculttranslation.com.
Our proofreaders created a full Arc 6 PDF using multiple groups' translations. That can be found here.
*(This PDF is outdated. WCT is currently revising older chapters now that they have more experience and knowledge of the Japanese language, having been announced in this update. For the most up to date translations, read on https://witchculttranslation.com. We will try to update the PDF periodically)