Since we are talking effective strength, it means strength and skill are already factored into the equation. Therefore, you are leaving an incredibly small gap between Lews Therin and the top 6 Forsaken.

To me the top 6 Forsaken might have approached Lews Therin's strength level - on the respective male and female contexts - but Lews Therin has unique skill in the Power - with only Demandred among the top strength channelers who comes close to matching Lews Therin's skill.

In other words, what I'm saying is that Lanfear may be 100 on the female strength list - corresponding to Lews Therin's 100 on the male list. But while Lews Therin is also a 100 on the male dexterity list - which is a freakishly rare occurence - no one on the female side has 100 female strength and 100 female dexterity.

So Lanfear might be a 100 in terms of female strength, but only an 80 or 75 in terms of female dexterity. In contrast, Demandred is a 95 both in male strength and male dexterity.

This unique combination of strength and dexterity is what gives Lews Therin his edge in battle against channelers who are just a hair below him in strength. This is what makes him so lethal. And what made him receive such acclaim, amongst other things.

So what I'm saying is that while Lanfear is off the charts in terms of female strength, there is nothing that suggests she is also off the charts in terms of female dexterity.