Yeah while poorly phrased, ever since SR4 they stopped directly augmenting Magic, which was the same time where some mechanics changed as to pools etc.
I agree with Quickening soon, but make sure to discuss wards and astral observers with your GM, to decide on the impact it will have on your play. Your spells are visible to any astral observer, until you pick up Extended (?) Masking, by then you're 3 initiations in.
My own setup would be Quickening -> Masking -> Extended Masking -> Centering. Get a power-focus when I got the cash, get a centering focus later on, and start being a crazy caster.