Once this script is loaded in your remote type /useNicks to make it work.
This script changes your nick to all your group nicks that haven't been used for over a month.

alias chanModeCheck {
  var %i = $chan(0)
  while (%i) {
    if (N isincs $chan(%i).mode && $me !isop $chan(%i)) { var %nModeChans = $addtok(%nModeChans, $chan(%i), 32) }
    dec %i
  }
  return %nModeChans
}

alias useNicks {
  if (!$chanModeCheck) {
    /ns glist
  }
  else {
    /echo -a 12The following channel(s): 4 $+ $chanModeCheck 12use +N lock if you're an operator on these channel(s) type !up on each channel, else leave the specified channel(s) where you're not an operator on! 
  } 
}

alias changeNick {
  var %totalNicks = $numtok(%nicksToUse, 58)
  if (%totalNicks) {
    nick $gettok(%nicksToUse, 1, 58)
    set %nicksToUse $deltok(%nicksToUse, 1, 58)
  }
  else {
    .timerUseNick off
    echo -a 12Finished using all unused nicks !
    nick %orgNick
    unset %nicksToUse %orgNick
  }
}

on *:NOTICE:*:*:{
  if ($nick == NickServ) {
    if ($strip($1-2) == group list) { 
      set %totalNicksInList $gettok($remove($strip($5), $chr(40), $chr(41), $chr(58)), 1, 32)
      set %count 0 
    }

    tokenize 32 $strip($1-)
    if ($4-5 == Last Used) {
      if (month isin $2-) { set %nicksToUse $addtok(%nicksToUse, $1, 58)  }
      inc %count
      if (%count == %totalNicksInList) { 
        unset %count %totalNicksInList
        if (%nicksTouse) {
          set %orgNick $me
          .timerUseNick 0 35 changeNick
        }
        else { echo -a 12No unused nick found ! }
      }
    }
  }
}