I'm curious if Phorge supports the ability to delete a specific Phriction wiki version internally. Have you ever tried?
At the moment it's not easy to me to figure this out, since I cannot easily retrieve the version PHID from the history, since the version PHIDs are not exposed from the frontend as far as I can see. So, I cannot run ./bin/remove destroy PHID-.... as usual.
I ask, since at the moment I just destroy the whole Phriction document and I manually re-create it, if just a single edit contains something that should be nuked.