Something

 var %att = attack level, %def = defence level, $&
        %str = strength level, %hp = hitpoints level, $&
        %rng = ranged level, %pray = prayer level, $&
        %magic =magic level
      var %combat = $cmb(%att,%def,%str,%hp,%rng,%pray,%magic)
      var %temp = $abs($calc($int($calc($gettok(%combat,1,32) +1)) - $gettok(%combat,1,32))), $& 
        %a.lvl = $ceil($calc(%temp / .32707)), %s.lvl = $ceil($calc(%temp / .324)), $& 
        %d.lvl = $ceil($calc(%temp / .25)), $&
        %m.lvl = $ceil($calc(%temp / .487)), $& 
        %r.lvl = $ceil($calc(%temp / .487)), $&
        %p.lvl = $ceil($calc(%temp / .124))
      if (combat style == Magic Based) var %lvl.base = Magic: %m.lvl
      elseif (combat style == Ranged Based) var %lvl.base = Ranged: %r.lvl
      else var %lvl.base = $c1(Att:) $c2(%a.lvl) $c1(Str:) $c2(%s.lvl)
      ;line above contains lvls for next combat lvl;