there are many ways to make something like this. here is just one more way..

on @*:JOIN:#: {
  inc $+(%,join,#)
  if ($($+(%,welcome,#),2) && $($+(%,joinss,#),2)) { msg # 8,1Welcome $nick $+ ! You are viewer 0,1#  $+ $($+(%,join,#),2) }
  elseif (!$($+(%,joinss,#),2) && $($+(%,welcome,#),2)) { msg # 8,1Welcome $nick $+ ! }
  elseif (!$($+(%,welcome,#),2) && $($+(%,joinss,#),2)) { msg # 8,1Welcome $nick $+ ! You are viewer 0,1#  $+ $($+(%,join,#),2) }
}
on $*:TEXT:/^\.(welcome|joins|stats)$/iS:#: {
  if ($regml(1) = welcome) { msg # Welcoming users on join is now 04 $+($iif($($+(%,welcome,#),2),DIS,EN),ABLED) | $iif($($+(%,welcome,#),2),unset,set) $+(%,welcome,#) on }
  elseif ($regml(1) = joins) { msg # Displaying join number on join is now 04 $+($iif($($+(%,joinss,#),2),DIS,EN),ABLED) | $iif($($+(%,joinss,#),2),unset,set) $+(%,joinss,#) on }
  elseif ($regml(1) = stats) { msg # 4,1Joins:0,1 $iif($($+(%,joinss,#),2),on,off) 04,1Welcome:0,1 $iif($($+(%,welcome,#),2),on,off) }
}