If you want to set approval site-wide, you could use approve unless trust level or approve new topics unless trust level instead:
(Though, just to note, these are marked to be morphed into being group-enabled in the near future - Changes coming to settings for giving access to features (from trust levels to groups))
There’s also approve post count if you wanted to just approve new users’ posts:
This topic is getting a bit scrappy and disconnected though, and has drifted quite far from the issue raised in the OP. It’s become more a succession of support questions rather than a discussion about community management.
Has this conversation run its course?