Maybe mild mannered genius Dr Bruce Banner is being confused with mild mannered genius Dr Waldo Butters? If you think about it Waldo is Bruce without all the Hulk emotional issues.
I took it it as using the Sword of Faith in its post Skin Game form as a scalpel to sever the Hunger from Thomas. The Hunger is all that if currently keeping Thomas alive, severing it would kill him. Thomas would require a truly massive amount of life force to be restored to what he was, and that would kill multiple mortal women even if they could line them up one after the other, so he could survive a severing. Using an Unravelling, of having Demonreach take Thomas out of stasis but not the Hunger would have a similar effect of killing a much weakened Thomas.
My solution Molly, third times the charm, (there is soooo much foreshadowing of Thomas feeding on Molly) she is likely still human enough for Thomas to feed upon but is immortal, it shouldn’t kill her (but may drain her humanity accelerating the process of the Mantle, so Mab would definitely approve “Kill Molly Carpenter.”)
While this would restore Thomas physically there is still his mental state to consider. Thomas loathes being a vampire, and being taken down by Demonreach means the being has to suffer all the harm they have perpetrated.
That would leave a restored Thomas in a bad state even if the missing Justine and their child are present for him coming out of stasis. My solution, a different Sword. Ammorachius is currently stored in Demonreach with the Shroud, Crown, Spear and Placard (although Harry is not above getting Michael to stick it in a huge stone in the foyer of Castle Dresden with the legend “whosoever pulleth this Sword from the Stone shall be the true King of these United States”) Thomas grabs it, afraid for Justine and the child and in and act of love runs himself through with it.
As with the Faithsabre a transformation occurs, but this time within Thomas, rather than the Sword inverting his hunger, changing it from a succubus to an Eros (or Erus in the Etruscan) as it was originally intended to be. There is foreshadowing of this, in Grave Peril Thomas’s costume as such was a loincloth and a pair of wings, the traditional appearance of Eros/Erus, when Thomas saved the Sword itself from being unmade.
The Faithsabre was created I think not just by the application of Butters faith, it was in proximity to the Spear at least which can make the impossible possible and would be a major compatible power source. With transformation now possible the application of faith and power made it probable. The Shroud, Spear and Crown proximity may facilitate the transformation.
Removing the Hunger would depower Thomas meaning Harry loses an ally and at best he gets to see his brother die of old age. Transforming the Hunger means Harry has a newly empowered ally capable of using the Sword, and a potential cure for White Court vampirism.
