So as the other discussion progresses about lightening bolts, I in my infinite noob deficient wisdom, was bothered by something with regards to Creo.
Base size for Animal is something of the size of a pony +1 size, or smaller. So when you make say rats, how many people go with the "I can make a number of mice equal to the size +1 of a pony", or something like one hundred rats. Then move to Group, you get the ten times mass of a Individual in number of animals right? The example spell, CotRS, uses weight to determine size of the swarm of locust. So you get a spell that makes a divisible mass of 1000 +1 sized animals, to be arranged as any quantities of animals that are +1 size or smaller. So going back to rats, 100,000 rats.
Now move on to Corpus and suddenly you are dealing with a base Individual of +1 size or smaller. I understand that in the paradigm of Ars (crap I used those two words together... waiting for my curse) a human is a different creature than animals; entirely separated from each other spiritually, physically, and magically, barring Muto of course. So can the same logic follow? "I make ten Dwarves (ten Individual human bodies with the dwarf flaw, size -2) instead of a single +1 Human." Then you move to Group. Do you get one hundred dwarfs with a specific spell to make -2 sized persons? Can you get one human corpse sized +4 (elephant), if you make a Individual with a size modifier high enough? It looks like you can, but would you need a Muto requisite? With Creo/Corpus Target" Ind you can make a human corpse at the top end of +1 size, so I assume at the low end of -2 and no smaller; but only ONE person, because Target is Individual. If that is correct then with a Group modifier you can only make ten persons of any one size or can you play with the mass like you do Animal? It would seem no because Animals each have different sizes, but then so do humans (+1 to -2). So with a Group spell can you Creo one hundred dwarfs - 2 size, ten small frame people -1 size, ten standard size 0 people, or ten large people +1 size? They would all seem to be equally massed soulless corpses.
Finally Auram. I can see where it says the base Individual of Auram is a weather phenomenon that affects the area within a standard Boundary - area one hundred paces across. But it also states a Individual is one singular phenomenon, one cloud, one wind, one lightening bolt. Each be the Platonic individual of a single phenomenon. So while Group would affect lightening as a number of bolts, it affects a storm as a mass or size quantity. And as for a wind, it could be either a number of winds or a strength of winds or well I will admit Target Group for Wind is ambiguous and I cannot be certain as to how to qualify it.
And then you have size modifiers for Auram. So a +2 size to a storm would be rather drastically different than a +2 size for a wind or a lightening bolt. A storm Target Group with a +2 size modifier would span a area 1,000 times the size of a single boundary, but a wind Target Group with a +2 size modifier could be a single wind, with 1,000 times the area, or force, or speed; but could it also be ten distinct winds, blowing with a 100 times increase in it's expression? Can it possibly be 1,000 distinct and viably individual breezes blowing on their own trajectories, each with a single wind phenomenon's strength based on Creo base level? I already did this with lightening, but could go a bolt of lightening with Group have to be ten Individuals, or could it possibly be a single bolt ten times larger? Or one hundred bolts each a tenth of a single bolt. This last example does not seem possible because you cannot reduce a Target below a minimum base size given. A minimum base for lightening is one bolt. So add a size mod to a bolt of lightening without adding a group and you get larger bolts of lightening?
I don't presume to know what the hell I am talking about I just wanted to see what others thought of my rational. Other than the single word "atrocious" response....