So,, if I wanted to increase my targeting, assuming I have a point of refresh to spare, I take a point in Refinement. Assuming I have a +1 Power in Fire magic (for evocation purposes), I can take a +1 to Control in Fire and a +1 somewhere else. Right?
I'm not sure what you mean.
By RAW, every refinement you take in control also boosts targeting.
If you remove that, it only helps for control.
Ex:
Discipline : 4
Conviction: 4
You can draw up 4 shifts of power. If you have a control foci of +2 and a power foci of +1,
You can draw 5 shifts of power and control with an effective discipline of 6.
But your targeting is based on your discipline of +4.
If you want to boost that, you have to use stunts like anyone else does for regular weapons.