So, I'm on a wiki with only one admin who has announced he will retire soon and is mostly inactive. There is only one discussion moderator, but he is not that active either. All of the other admins have been demoted/left so there isn't really anyone to watch the wiki.
So far it has not been a major problem. No huge rules being broken or anything like that, the thing is there are tons of little incidents of useless pages, off topic posts, and some rare vandalism. It is small enough I can't get our wiki manager every time but I am worried about the wiki's future.
I reached out to the admin, who said they will consider promoting me if they decide to leave forever, but in the mean time I am at a loss of what to do.
How should I proceed? It isn't big enough to get staff involved but I'm worried that with no active admin things could quickly spiral out of control.