User blog:ChainsawAddict/Most useful form of Blood Magic in short term?

Ok, I get this sounds dumb, but what is the most useful form of blood magic in the short term or (in other words) at early levels? I get that Blood Magic like thaumaturgy is supposed to be more like a quadratic pursuit (requires lot of investment, pays off with high firepower in long run), but I need some insight into the forms of Blood Magic that are most useful for beginners.