[Astromancer]

I could see a Matriarcal Goddess offering a Pact which gave those that followed a 15 point Code of Honor ( Matriarcal Warrior Witch) and a Disceplen of Faith (Ritualism) and Vow ( Fight for the Glory of the Goddess) eight levels of Magery that could only be used in battle. Magery with the limitation only in battle would be about six per level. Thus fourty-eight points minus about thirty-five for the Code of Honor, The Disceplens of Faith, and the Vow, for thirteen points. Thus an IQ 12 Magery 3 warrior woman with a base rate of thirteen, would have a Base Rate of 21 ( 20 for Very Hard Spells) in battle. Thus they would have the ability to cast without gestures or speech( a massive advantage in a fight) and substantially reduced energy costs.

Adapt the Disworld Staff Advantage to cover the swords of the Warrior Witches and ways to store more fatigue in their arms and armor and these witches could mow down vast armies with small war bands.