Personally, I prefer the Daughters of the Earth because they cast spells both during and outside of combat. That is, with each attack, the Daughters of the Earth cast a spell on the enemy, and after slowing them down (I'm not sure about the exact effect), they can attack as many times as they want, and the enemy won't be able to retaliate. (This only applies to those who are hit by the Daughters of the Earth's attacks.) That's why, as spellcasters, I prefer the Daughters of the Earth. There's nothing to say about Blood Wrath.