Given that the German wiki's staff is inactive, you can post a request here for promotion to a moderator's position. Just read the rules for applicants carefully and make sure you meet all requirements, such as making a blog post about your request on the German LoL wiki.
"This page is where you can request administrator and/or bureaucrat rights on wikias without an active admin and/or bureaucrat team." The sentence suggests active moderators do not count towards the requirement, since moderators cannot grant rights to other users. I would strongly suggest that you apply anyway, since you seem to hit a lot of roadblocks on account of lack of special privileges that your work on the wiki requires.