Hi everyone, I'm new here and so I apologize if his has already been discussed to death (I didn't find threads in a search, but there are a lot so I could easily have missed some).
But I've long wondered if Harmony is right when he describes the connections of Metallic Arts to Ruin, Preservation, and an interaction between them. His connection of Hemalurgy to Ruin seems clear enough: you have to kill a person to use it, and the amount of power in the resulting spike is less than the victim had. Ruinous.
But Feruchemy always seemed more like Preservation to me than an interaction between Preservation and Ruin both. Nothing is gained or lost when an attribute is stored or withdrawn, it is just maintained almost perfectly until some time in the future. Where is the Ruin in that? (The only example I can think of with imperfect storage is Ruin's manipulation of copperminds).
Conversely, Allomancy requires serious physical damage to awaken, destroys the metals used to catalyze its effects, and is described as producing a net gain by Harmony. None of those are very Preservation-like. In a similar vein, Preservation couldn't create dynamic individuals by itself and required cooperation from Ruin to create the humans on Scadrial-- the ability to choose to Preserve at some times and Ruin at others was more than was present in the other animals implied to be within Preservation's ability to create. That sounds more like the Allomantic net gain to me.
My mind reaches for explanations and finds unsatisfying scraps. Allomancy existed before anyone swallowed lerasium, albeit in a weaker form, and Preservation was already a critical component of Scadrial's people, so maybe their Allomancy came from that and the huge dose of Connection from lerasium beads creates the otherwise impossibly rare Mistborn. But then the Connection to Preservation from burning lerasium doesn't grant them anything like Feruchemy, so that idea starts falling apart...
All of this is pretty pointless speculation since we have so much information suggesting that Allomancy goes with Preservation: the mists swirl around people using Allomancy but not Feruchemy, swallowing a bead of lerasium is what grants super-Allomancy (in the form of Mistborn) in the first place, and Harmony (who holds both relevant Shards and would presumably know everything on the topic) explicitly says so. But outside of those, is there any discussion, here, in-text, or in a WoS that addresses my confusion?