So to give a better explanation for my question; I was reading paranet papers and obviously everybody who loves wizards in dfrpg has seen the Mental Toughness power chain. Looking at it I became dissatisfied with the obvious progression, sure you have more spells via the longer stress track but unless you have a means you wont necessarily be able to take advantage of the increase in shifts of power. Your #10 box provides 9 more shifts of power than your #1 box, and reaching Conviction + 9 in control isn't necessarily easy to do.

So the obvious thing, something that has been holding conviction based spell-casters back is the lack of fallout and/or backlash mitigation. This compounds the fact that discipline is superior since excess shifts equal excess damage anyway .

Reading more of Paranet Papers, this seems to obviously be the kind of thing the soulfire stress track looks good for. For example 6 refresh in Soulfire and Inhuman Mental Toughness lets you perfectly absorb backlash for your entire mental stress track (5 mental stress boxes call for absorbing backlash, and you have 5 boxes of soulfire stress)

So now I'm thinking a "Channelling Tattoos" sponsored magic which works similarly. Something like:

Channelling Tattoos
You have tattoos covering your body which have been designed to safely channel the backlash from summoning large amounts of magical energy. Furthermore, if you are skilled in their application, you can make use of this excess energy to power magical tattoos which function as enchanted items.
Musts:  You must have both the Evocation and Thaumaturgy powers, and at least one crafting specialization. You must change one of your aspects to represent your new magical paradigm.
Skils Effected: Conviction, Discipline, Lore
Cost Varies, at least -3. Since Channelling tattoos require evocation and thaumaturgy there is no discount for having either.
Effects:
Magical Tattoos. You can craft magical tattoos as enchanted items. You gain 4 enchanted item slots, and you gain +1 Strength and +1 Uses per day, stacking with any specializations you may currently have. While magical tattoos can not easily be removed they can be damaged, either through mundane means (burning, slashing, etc) or by channelling more backlash than you can control.
The Tattoo Stress Track. The tattoo stress track defaults to two boxes, like most stress tracks. You can opt to increase its size by taking more refresh in the Channelling Tattoos power, -1 per box. The track can only take self-inflicted stress for the purposes of absorbing backlash—no one can attack this stress track, and you can’t use it to absorb stress from any other source. You must choose to use it to absorb backlash from your spell-casting. You also get a single mild consequence slot to reflect the impact of channelling backlash or having your tattoos damaged though mundane means. Proper aspects would describe burnout or physical damage of your magical tattoo enchantments, making them less effective, unreliable and possibly fatal to use.

What do you all think of Inhuman Toughness or greater that only protected against backlash damage? Perhaps via tattoos of some sort that channel the excess magic in a safer way.