on *:text:*:#:{
  if ($ulevel == Admin) {
    if ($1 == !add) {
      if ($2-3) {
        if ($2 == OP) { auser op $3 }
        if ($2 == Admin) { auser admin $3 }
      }
      else { notice $nick !add level nick }
    }
    if ($1 == !op) { if ($2) && ($me isop $chan) && ($2 ison $chan) { mode $chan +o $2 } }
    if ($1 == !deop) { if ($2) && ($me isop $chan) && ($2 !isop $chan) && ($2 ison $chan) { mode $chan -o $2 } }
  }
  if ($ulevel == OP) {
    if ($1 == !op) { if ($2) && ($me isop $chan) && ($2 ison $chan) { mode $chan +o $2 } }
    if ($1 == !deop) { if ($2) && ($me isop $chan) && ($2 !isop $chan) && ($2 ison $chan) { mode $chan -o $2 } }
  }
}

Or

on *:text:*:#:{
  if ($ulevel == Admin) {
    if ($1 == !add) {
      if ($2-3) {
        if ($2 == OP) { auser op $3 }
        if ($2 == Admin) { auser admin $3 }
      }
      else { notice $nick !add level nick }
    }
  }
  if ($ulevel == Admin) || ($ulevel == OP) {
    if ($1 == !op) { if ($2) && ($me isop $chan) && ($2 ison $chan) { mode $chan +o $2 } }
    if ($1 == !deop) { if ($2) && ($me isop $chan) && ($2 !isop $chan) && ($2 ison $chan) { mode $chan -o $2 } }
  }
}

Or

on *:text:*:#:{
  if ($ulevel == 3) {
    if ($1 == !add) {
      if ($2-3) {
        if ($2 == OP) { auser 2 $3 }
        if ($2 == Admin) { auser 3 $3 }
      }
      else { notice $nick !add level(OP/ADMIN) nick }
    }
  }
  if ($ulevel >= 2) {

    if ($1 == !op) { if ($2) && ($me isop $chan) && ($2 ison $chan) { mode $chan +o $2 } }
    if ($1 == !deop) { if ($2) && ($me isop $chan) && ($2 !isop $chan) && ($2 ison $chan) { mode $chan -o $2 } }
  }
}