I think that sponsored magic in fact might be able to reduce the healing time or get rid of a mild through means of thaumaturgy at the speed of evocation. As always it'd depend on the sponsor. To me it makes perfect sense that soul fire could do it but not very much else. Even summer magic seems not to qualify ... can't imagine wild growth is something you want to happen in your body *g* .
It's still seams a big IF considering that sole fire is hard to come by.
Actually, Summer magic is one of the sponsored magics that can do potent healing effects. It's specifically mentioned in
YS:288 Under "What you can do with it"
Sometimes the power
source is instead more potent (or at least faster)
when directed against certain types of problems,
such as Summer’s ability to do more potent
healing effects (the sponsor takes care of all that
pesky biological know-how) and YS:290 Seelie Magic Benefits
This includes
the ability to produce effects along the lines of
biomancy (page¤284) with less of a requirement
for biological expertise in the spellcaster—the
powers of Summer already understand biology
pretty well and will do the heavy lifting for the
casterAnyway, regarding the possibility of accelerated healing through spells.
The RAW are inconsistent on healing in general.
On the one hand the basic biomancy rules explicitly state that recovery time can NOT be shortened,
YS:284
The main advantage of healing magic in
the game is in providing justification to begin
the recovery process (page¤ 220) without any
other effort. Use the shift value of the conse-
quence (which you can stack together for
multiple consequences) as the spell complexity.
Remember, the recovery time can’t be shortened
with these kinds of magics—the target still has
to go through the healing naturally.
On the Other hand the Reiki Healing spell in YS does exactly that, shorten recovery time.
Now concerning the issue of mid conflict healing:
Take a look at Mythic Recovery.
This is a -6 refresh power dedicated to healing yourself. It heals severe consequences in like... no time at all.
However, it does not do so during a conflict.
It allows for instant recovery from several mild consequences, but anything above that is always present until at least the end of the scene in which it was inflicted.
If a quite costly dedicated healing ability can not heal anything worse than a Mild Consequence during conflict, i think it's quite a stretch to allow the more general magical ability to do so.
Especially that given the basic Biomancy rules, healing spells that shorten recovery time at all are a stretch in the first place.
I think healing magic that reduces recovery time by one level is already quite potent. And according to the source material it is a kind of magic that is rare and highly difficult.
Therefore i think magical healing should not occur mid conflict, except through the dedicated recovery powers.
And it should be limited to one use per consequence, reducing recovery time by one level at most.
So that's my take on this.
I think it fits the spirit of the rules as well as the source material quite nicely.
However the RAW are inconsistent, so anyone feel free to disagree