Let me start in the beginning so you could try to make sense on what I'm saying:
We have a persistent vandal who is continuously vandalizing our wikis and no matter how many times we block him, he always keep coming back with an obvious username. Most of his vandalism is replacing content and renaming pages. I am currently contacting the FANDOM staff to resolve our problem since he persistently keep coming back; most of their suggestions have little to no effect to stopping this vandal.
One of the particular vandalism he's doing right now is spam re-uploading of existing image files. All these "revisions" have no pause in-between and it's imperative that he's using a third-party software to do this. How is this possible? Shouldn't it be accessible for admins only? I was able to contact the FANDOM staff about this and they decided restrict image reuploading to admins on all our admin'd wikis
So is there any easier way to select multiple image revisions and delete them all at once? This is a really straightforward answer; there isn't any more detail I can put here.