Mechanically it would be as simple as focusing on Thaumaturgy and potions, (runes). If you have focus items, those could be your tattoos, or a bag of rune stone. You could also have an aspect involving your runes specifically, so you can always have an easy tag based on your theme.

Did you have a theme, like FMA or a variation it that anime? Also, will you be using an existing set of runes, on an invented one?

Your comment on programming gave me the thought of some young computer geek from the currant generation, immersed in computers and social media from the time they could talk. Then BAM! Puberty and their powers hit, and they lose it all. But their powers are affected by the way they grew up. Casting spells by writing the effect out on a keyboard, spells written in programming languages, (indecipherable to other wizards).

I think that it means that as Mother Winter, she has ultimate authority over who gets the mantel, but left it in the possession of Mab to grant.

"Turning and turning in the widening gyre
The falcon cannot hear the falconer"

Maeve had stopped listening to Mab, and started listening to Nemesis.

"Things fall apart; the centre cannot hold;
Mere anarchy is loosed upon the world"

Sums up Cowl nicely, Nemesis as well.

"The blood-dimmed tide is loosed, and everywhere
The ceremony of innocence is drowned"

The Fomor stealing innocent practitioners, those with a magical bloodline.

You could find parallels throughout, but I would also add that Harry has often been referred to as a fulcrum, or "In the center", directing the turn of events.

Well, certain recent events in the books and theories in the forums have laid out the possibility that Nemesis is in the council to some degree. We have also seen that The Erlking is at least willing to hunt outsiders, if he is not actively engaged in fighting the enemy. So he may have given the belts to the FBI agents to aid them in hunting out the agents of Nemesis, and warned them about Harry because he was an unknown quantity, aside from being a WC agent.

Chapter 22

Harry decks Sharkface with a Winter/Soulfire infused punch.

8 shades of "Stare into the fist of Dredd!"

Mein Kampf by Evil Bob

Hey, in the Dresdenverse, this might have some merit.

Fire safety ( a P.I.'s guide how to handling hot situations) - Harry Dresden

Hmmm, Fire Safety... fire safe. Fire safe...safe room.

Safe Room A novel of the Dresden Files.

My mind is in a squirrely place today.