I'm not happy with the mechanics for Agile Reflexes, CoG p126. It grants +1 SR per 10% Grimoire, and also 1 additional CA Per 6 points of Magnitude added. I think this is the only sorcery spell that gains a beneficial effect from Magnitude and I'm not convinced that the rules need to be bent in this way, I'd rather it were per 6 full points of SR.