The "new list" is an updated female strength list after new female channelers were introduced in the series, Lanfear weakened and maybe Nynaeve became stronger due to the Cleansing.

Therefore I definitely wouldn't include Lanfear on the "new list". She probably only appears as Cyndane on the new list and thus isn't among the six strongest.

I think it makes some sense that at least one of Tuon's personal damane, namely Sera, Lydia, Dali, Dani or Charral (see WH, ch. 14), is among the six strongest female channelers. After all Tuon states, "the six she had brought with her were her best". Most likely it's at least Sera, who is called by Tuon "the strongest, and proud as a sul'dam".