Then it devolves to their aunts and their progeny, respectively Louis XIV & Philippe d'Orleans (from Anne of Austria) & Leopold I (from Maria-Anna of Austria). So, as the Russian saying goes, "this is song that's very good - start it from beginning", so excluding the sisters either solves nothing or handles the crown to... Philippe d'Orleans as an adult compromise candidate (the only one who is not a ruler of something, not a baby and is not expected to inherit anything as his Royal brother is evidently fertile).