Arcanum eight needs things to be clear and to be fair. It settles down once it knows how everything is arranged: who answers for what, under which rules, and why it is done this way and not another.
Hence a meticulousness that looks like pedantry from outside and is, from inside, the condition of calm. Anything left unclarified hangs on arcanum eight as a weight until it has worked its way through it.
The other half of the zone is fairness. A person like this finds it hard to watch rules being applied selectively, and almost always steps in, even when the matter does not concern them.
The best setting for arcanum eight is one where rules exist and are the same for everyone. In chaos, or amid double standards, it does not work, however hard it tries.