Bear in mind what follows is going with the mechanics/themes of the dresden files stuff.
You could have it work out that rather than "Fire" and "Wind" being a single entity, that rather you've discovered the Name of a particular Spirit of that element, hearkening to Sponsored Magic stuff (since everyone learns just a part of the Name it would work as being different faces of the element) but working as Evocation, since Sympathy works a lot like Ritual and Channeling being fused together.
Rework Evocation to replace the bonus two elements (or further define you're talents, ala Avatar the Last Air Bender) to gain a bonus Refinement in your particular element. So you can pick up Fire (+1 bonus to off/def control/power), Lightning (purifying fire to focused plasma), Ice (manipulation of heat specifically) OR gain Fire (+1 Bonus to off/def control/power) and Fire (+2 Bonus to off/def control/power).
I have to admit, having Naming work as Super Enhanced Channeling feels right with me, considering what we know of Naming from the books so far. Or at least from what I remember from the books.