I personally prefer the Daughters of Earth because they cast spells both during and outside of combat. That is, with each attack, the Daughters of Earth inflict 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 Earth's attacks.) That's why, as spellcasters, I prefer the Daughters of Earth. There's nothing to say about Blood Wrath.