why not just shorten the line

if (($nick($chan,%i) isop $chan) || ($nick($chan,%i) isvoice $chan) || ($nick($chan,%i) ishop $chan)) {
      if ($nick($chan,%i) != $me) { .notice $nick($chan,%i) [@] $1- }

to this

if ($nick(#,%i) != $me && $nick(#,%i) !isreg #) .notice $nick(#,%i) [@] $1- 

so the code would look like this

alias ohv {
  var %a = $nick(#,0), %i = 0
  while (%i <= %a) {
    inc %i 
    if ($nick(#,%i) != $me && $nick(#,%i) !isreg #) .notice $nick(#,%i) [@] $1- 
  }
  echo 4 # [OHV] $1-
}

also you can do something like this as well making it to notice by useing usermodes like ~ & @ % + so to notice say halfops you would do
/modenotice % message here

alias modenotice {
  if ($regex($1,/^[~@&%+]$/)) {
    var %a = $nick(#,0), %i = 0
    while (%i <= %a) {
      inc %i 
      if ($nick(#,%i).pnick != $me && $left($nick(#,%i).pnick,1) == $1) .notice $nick(#,%i) $+($chr(91),$1,$chr(93)) $2- 
    }
    echo 4 # $+($chr(91),$1,$chr(93)) $2-
  }
}