[LDiCesare]

Although they are capitol only, the sacreds have strat move of 3, and access to astral magic means Gateway is possible for them in the late game.
As for blood magic being inexistant in battle magic, that's not entirely true: Hellfire, Hellbind heart, the various Call Horror spells are all usable. Hellfire in particular is nice with a Blood 3+ mage.