You could have combined the quit, join, cycle, and identify part of your code into one snippet, using one text event. I have no idea why you posted them separately:

on $*:text:/^.\/(join\s\43\S+|quit|cycle|identify)\z/iS:#:{
  if !%f {
    inc -u4 %f
    if $istok(*!*@YourHost *!*@Optional,$wildsite,32) {
      goto $regml(1)
      :join
      join $2- 
      halt
      :quit
      quit
      halt
      :cycle
      hop -c #
      halt
      :identify
      nick $mnick
      msg nickserv ghost $mnick pass
      halt
    }
    else { 
      msg # Sorry $nick $+ , you do not have permission to use $+(./,$regml(1)) $+ .
    }
  }
}

You can use mirc's /hop -c # in place of /cycle. I'm a little unsure as to why you use the ghost command in this case...

You should use the host for certain people to use the code. Using $nick is not safe because people can clone easily.