So are the three girls, especially Nyn.Iirc, it was made known early on that regardless of the difference in strength, any of the Forsaken is far more powerful than the most powerful current Aes Sedai. Going by that logic, neither Elayne nor Egwene or Nynaeve should have any chance to triumph against them. Surviving the encounter, sure, beating them? Nah.
Anyway, only Nyn beats a Foresaken in fair fight. Egwene beats one in dream world, and also M'Hael who is a new Foresaken, while Moiraine balefires one while he is concentrated in Rand.
How on Earth you know that? It is explained only in the end of the penultimate book.Also I've just remembered she gets even weaker after being imprisoned.
Man, feck this book.
Btw, she is stronger than the current Moiraine while she has that powerful artifact.