I'd throw something like this in there:

Code:
menu nicklist {
  Voice selected: mass $chan +v $snicks
  DeVoice selected: mass $chan -v $snicks
}

alias mass {
  if (!$3) { echo -a ERROR: No nicks selected | return }
  var %in = $replace($3-, $chr(44), $chr(32)), %max = $iif($modespl, $v1, 4)
  var %c = 1, %t = $numtok(%in, 32), %ms = $left($2, 1) $+ $str(%max, $right($2, 1))
  while (%c <= %t) {
    mode $1 %ms $gettok(%in, %c - $calc(%c + %max), 32)
    inc %c %max
  }
}

Saves having to repeat code lots *shrug*. Also allows the user to use a comma-separated or a space-separated list (easier for /command type actions).