The damane and sul'dam cannot see the weaves from men. I'd dress up the bonded Asha'man to make them look like tower guards. Then I'd have the Asha'man simply club every sul'dam and damane they see with a mace of air. The Seanchan would have no idea what was hitting them. They'd be focusing all their attention on the circles of women. After all, who could ignore the enormous volumes of power being wielded right in front of your face by the circles of women. That's the secret power of the ASha'man disguised as tower guards. While the seanchan focus on the AS circles, the Asha'man would be extremely deadly.