This is already possible, kind of, through Hermetic Alchemy, in that Form vis other than Vim can be extracted from an Aura.
That being said, there is already a system at the disposal of the PCs, that's the Redcap vis trading network, and works at a 2 for 1 conversion...
I was under the impression that, in addition to its target/duration, it was ALSO a ritual due to the number of things it did - ie, if you broke out all the individual elements of Aegis, it would be more difficult than it actually is. (Serf's Parma, but I also thought that at least one of the things it did wasn't available as a Guideline.)
The guideline isn't explicit, true, and by extension whether it is a ritual based on the spell guideline is also not explicit. The other parameters of Boundary and Year ensure that it is a ritual and so, any changes to those parameters now bring up a previously unanswered question as to whether the underlying effect is a ritual. It's an assumption that the unwritten base guideline is a ritual level effect. I made the determination that it was not, so once those parameters were changed, I created a version of House Tremere that could deploy a field Aegis in seconds, rather than an hour or more. It's something that SGs/Troupes need to think about when messing around with changes to the D/T parameters of Aegis.
My take on that would be to consider two cases:
Aegis remains a ritual, no matter the duration/target parameters: probably a minor Breakthrough for each parameter. And for background flavour, the reason it was not before could be:
1) everybody was convinced it could not be possible, so nobody bother trying
2) the perceived benefit was too small to be worth the effort (in this case, it is conceivable that some Tremere magi did already the work to have highly specialised, more efficient Aegis with target: room to protect sensitive lab or vault - after all, it is worth a +/-2 magnitude modification allowing either better penetration or much higher Aegis for the same magnitude).
Aegis ritualistic aspect is purely linked to Duration: year and target: Boundary, so downgrading both parameters to make it non-ritual would be an Hermetic Breakthrough. It would either required an Original research or to be familiar with the magical tradition Notatus used to design the Aegis (was it Mercurian magic or another kind ?). Somebody completing this task would be a serious contender for House Bonisagus' Primus position. It will have a significant impact in and outside the Order as magical item with strong magical protection would become feasible. I am sure there would be a lot of politics to control this kind of magic as it will directly compete with Parma - I could see Quaesitoris, Flambeau and Tremere strongly opposing this knowledge to be accessible to any magus (possibly even most magi could be against), Mercere trying to negociate an exception for their Redcaps. Aegis with target: self and duration: Sun or Moon on an item would be more or less equivalent to a Parma for the item's holder.
As a side note, I am almost certain that I read somewhere that toying with the Aegis would always require an Hermetic Breakthrough because it is incorporating non-hermetic element, but I cannot find the quote.
Houses of Hermes: True Lineages states that it is a Major Breakthrough.
I don't see it being in competition with Parma, I don't even see it as being as closely guarded secret as Parma, because you can't cast it unless you know Hermetic Magic, unlike the Parma Magica. It augments Parma (if you believe that it should stack with Parma on effects cast outside of the Aegis, while it does stack on attacks cast within the Aegis).
The only non-Hermetic tradition Notatus was using was the Parma Magica itself. Otherwise, it's Original Research.
No. Integrating non-Hermetic elements is not a Hermetic breakthrough, it's an integration, which can be any level.
Anyway, an idea for a breakthrough for a concept I've been kicking around:
A ReVi(Te) guideline, allowing you to magically trace any circle you can affect, used in conjunction with another spell that targets a Circle or Ring.
How about a version of Aegeis of the Hearth which protects all within from the social effects of the Gift? Major or Hermetic?
Or a version with duration ritual (mom) meaning the aegeis is now a thing in and of itself, presumably with magical might...
ArM5 (page 161) says Notatus's breakthrough required the incorporation of Mercurian rituals.
It doesn't violate any of the Limits, so it's probably not a Hermetic breakthrough. And a personal variation of that already exists, in the form of Gentle Gift. (EDIT - or the minor supernatural virtue "unaffected by Gift", from RoP:M.)
The virtue itself is listed as Hermetic, but I believe that's simply due to the age of the core rulebook, back when all Virtues that dealt with the Gift were Hermetic (regardless of whether the character who had the virtue was part of the Order of Hermes). But regardless, it's a technique that is currently fully compatible with Hermetic Magic, so again - probably not a Hermetic breakthrough.
You could probably get Integration points from studying House Jerbiton, who would be DELIGHTED to help you. (Seriously, all those other magi are tacky. Anything to help would be appreciated.)
I believe a momentary duration ritual to create a permanent Aegis would be Creo Vim rather than Rego Vim, probably with a Rego requisite. Otherwise yeah, I don't think that violates any limits. It would probably still be a very high level breakthrough, though. A big Major one or a Hermetic one.
probably hermetic, given the way the aegeis barely connects to Hermetic theory anyways.
I would look more twoards inventing D:Permanent like was used in older editions of the game. Equivalent magnitude of Year or perhapes a hair larger (+5 or +6?) requires a ritual can be dispelled but otherwise doesn't end. Can be used to create permenant wards or transformations or (perhapes with a further breakthrough )a permanent Aegis.
what about a breakthough involving candy/food would that be major or minor?
my theory is that it would depend of how the breakthough was used primarily.
For food, Ancient Magic is the way to go. Runic Magic creates real food, again, and again, and again. And the rules for Ancient Magic are far kinder then the rules of OR, if you have a lot of sources, like you do for Runic Magic.....
To be truly useful a breakthrough regarding food would have to break the limit of creation. Or is Vis? Serf's parma.
I had a Combatoriented Bonisagius Seeker (Trianomae) who researched: Duration Combat
It works as if was a +2 Duration but ends after I calm down after the combat is ended. If there is a new combat later the same day, I have to recast the spells.
It was mainly used to have the Silvery scales of the Knight that did as well as Invisibility, so I did not have to have the harnessed magic virtue.
Another idea I just had was time related magic for traveling through time, maybe?
Based upon that sentence, Nope. See page 80 of the core rules in your 5e rulebook Abe.
Can you please detail more about your idea? It sounds like you're really onto something wonderful. Given the setting you're conversant with, could you provide a short description of how you see it working? How? Why?
A spell that allows the caster to skip foward 2-3 minutes in time to avoid dangerous spells entirely!
That's what I was basically going for with my suggestion.