I would rank Valkyries above Sages but below Bishops. Mages can do fine offensively, and Bishops need the promotion to get Light magic and the additional Movement. Druids are debatably above Valkyries, depending on the game. There are plenty of Anima magic users but typically few Dark magic users. I use Valkyries more for their Staff utility than offense, and they do that fine as Troubadours.