My wife says a Crafter would just buy the guns and go do it.
I think this is because that she is not interested in killing a bunch of people, yet.
My cousin who I believe was a Crafter worked as a welder in an aluminium plant. Instead of watching television in his spare time he built A class fuel dragsters. Countless hours of planning, designing, collecting parts, polishing, machining, painting, assembly and disassembly to build a machine to take a couple of blistering 8 second rides per year.
As far as the opposite nature of madness, I don’t think that it refers to temperament. For example we can’t observe a “mad” action and conclude that the perpetrator’s temperament is opposite of the action, i.e. a Rational doesn’t become a Guardian; an Artisan, an Idealist. The opposite nature seems to me to be a short circuiting of productive goals. However, it would seem that the new goal would be sought by the inborn interests and abilities. Hence the action people will still take action, the thinking people will still think, the feeling people will still feel and the guarding people will still guard.
As to Holmes, this is going to be harder than I thought, not just because the police have decided that releasing information will jeopardize the prosecution, but it is difficult to determine a temperament from someone who has, for one reason or another, not been able to find their abilities.
For example, I am trying to classify this crime with other similar ones. My first attempt is that, say unlike the Unabomber (before Holms my working theory was that Rationals were only dangerous in their productive mode), what murders are clearly acts to get attention. That is to prove that the perpetrator is not unworthy and deserves to be abandoned but is a important dangerous force demanding attention. In other words they must get credit for the dramatically horrendous act. So I gave a brief look at Bremer (George Wallace), Chapman (John Lennon), Cho (Virginia Tech) and Eric Harris (Columbine) to see if there were obvious temperament
At this point, I don’t see any. I will look further when I get time.
Everything should be made as simple as possible, but not simpler. - Albert Einstein