I think it's pretty clear that Nynaeve, who had been unconsciously channeling for the better part of a decade, would have been very close to Moiraine (who is maybe 50% of Nynaeve) level when the series started. This also explains Moiraine's bonfire v. candles comment as Nynaeve would walk in the door and already have more strength than any living AS, and in a Tower where many women were starting to question if Strength was on the decline! We know she's already pretty close to Siuan's strength at the very beginning of TGH and certainly after Falme had grown even more ... by TSR IMO she had hit about 90% of her potential (her growth going from Moiraine to Moghedien took about 18 months). Then within the next 9 months (the timeline between her fight with Moghedien and the Cleansing) she continued to grow at a more normal pace.

Egwene was damane which likely forced her from a very beginner to close to Moiraine's level in just a few months. That's probably 60% of her strength in like 2 months ... no wonder Nicola thinks no other woman had ever gained so much of her strength so quickly. But we also know that Egwene continued to grow rapidly between TSR (where at the beginning she's a bit stronger than Moiraine) and when she becomes Amyrlin. It explains why she and Elayne are so afraid of Rand in that scene too ... his growth is even more astonishing! He would have been more than 2x (men have levels above women) than either of the girls at this point, even if he was only at 85% so of course they feel like kittens next to him.

We know she and Aviendha both are more than 50% of absolute female strength by the end of TFoH as Moiraine indicates the two combined could overwhelm a Female Forsaken, but at this point Aviendha had only been channeling for a couple of months and was likely not anywhere close to Egwene... she may have been as strong as Moiraine at this point. Meaning Egwene at 85% of her potential added to Aviendha at maybe 60% could overwhelm a FS level female.

Further more it explains why Egwene was more cautious in her assessment of Moghedien (when Moghedien escaped Egwene may have only been at about 85% ... still far stronger than any woman in camp, but a much longer step down from Moghedien than she is now, remember too that Egwene could not Channel for a couple of months at all after the attack by Lanfear which likely slowed her growth, and spent more time learning to Dreamwalk than Channel under the WOs ... now she believes she can take on Mesaana head to head in ToM ... if she's full strength now she's much closer to the FS than before.

She was probably very close to if not already at her full potential by WH, leaving Elayne and Aviendha behind by a decent margin, and now only a bit shy of the Weaker Forsaken (Moghedien and Messana), but probably still a goodly step down from the most powerful (Nynaeve level). I've always thought Nynaeve was about 20% stronger than Egwene ... or the equivalent of a woman like Daigian.

The debate has always been that many posters here feel Egwene is more like 50% of Nynaeve's strength. That seems preposterous to me given all the evidence in the text to the contrary. We know Egwene is stronger than two Strong AS combined, and we know that strength follows a bell curve, so if Egwene was only around a 50-60 on a 100 point scale there should be literally thousands of women at her level and thus far, Forsaken aside, we've seen only about 10 women who can match or exceed her potential. We've been exposed to something like 10,000 women who can channel between the various groups and in every instance we hear about Egwene/Elayne/Aviendha's strength ... the WF told Elayne she had never met anyone so strong as her and Nynaeve (and they were only able to produce 2 women), the WO have produced 3 women aside from Aviendha (and we don't know for certain that Tamela and Viendre are actually above Elayne since she was not at full potential when she encountered them) and we've seen 1 damane (maybe 2 if Tuon's strongest Sera is ever quantified) who out match them.

It's a consistent theme that the "Wondergirls" are very close to the top level of strength. But I think people forget sometimes that the timelines in the books aren't the same in every book. The first 4 books are more than 1/2 of the total series timeline and it's obvious that none of the girls have peaked by then!

In the end it doesn't much matter since the odds of getting a direct quote are basically NIL ... but it makes for lots of conversations on the forum!