First I'll start by saying I think these women are all about 10 levels too strong from the way they were depicted in the books. With the possible exception of Liandrin herself, who could plausibly be as strong as was outlined in the Companion.
Liandrin, Red, Level 14, age 36, Tarabon, captive to the Seanchan
Marillin Gemalphin, Brown, level 15, age 152, Andoran, freed by Mellar fate unknown
Eldrith Jhondar, Brown, level 16, age 116, Amadician, killed by Mellar
Falion Bhoda, White, level 17, age 127, Kandori, Killed by Aviendha
Rianna Andomeran, White, level 21, age 76, Kandori, Captive in Stedding Sholoon
Ispan Shefar, Blue, level 17, age 109, Taraboner, Killed by Careane
Berylla Naron, Blue, level 27, age 67, Illianer, MIA since Moghedien gave her orders
Temaile Kinderode, Gray, level 17, age 57, Cairheinin, Killed by Mellar
Joiya Byir, Gray, level 28, age 171, Andoran, Killed by Slayer
Asne Zeramene, Green, level 18, age 163, Saldaean, Killed by Windfinders
Jeaine Caide, Green, level 18, age 88, Domani, Killed by Thom Merrilin
Chesmal Emery, Yellow, level 18, age 137, Ghealdanin, Killed by Elayne
Amico Nagoyin, Yellow, level 27, age 32, Arafellin, Killed by Slayer
Why do you think they are too strong by 10 levels? What depiction? They were always depicted as average sort of Aes Sedai and their acts and abilities reflected such. Liandrin was mentioned as the strongest - I was surprised at 14 but it's not outrageous.
Fan of Lanfear