Thanks for the table - the item amount minimum especially saves me some time.
A bug and a quirk that I noticed:
The bug: "Set Minimum Item Amount" doesn't seem to work on gain, at least not when creating quartz in a factory. It won't set the amount of the quartz you're creating, but it sets the quartz/etc. that you're
using as expected. Placing a quartz in a slot is a work-around for this - presumably because it triggers the "use."
I don't really have a place where I can test it in other circumstances, since I tend to cheat my money and buy up the stock. Something to look at, at least.
The quirk:
When you set stats using the character editor, it works... until you change your equipment.
For permanent stat gain, it seems that the game tracks a stat boost from using droplets (permanent stat gain potions) separately. It doesn't seem to track equipment gains (which means that anything that's not permanently gainable may not be permanently settable,) but the stats gained through the Vitality, Power, Fortitude, Magic, and Spirit droplets look like they are tracked in at least a 2-byte integer (I think the game hard caps at 9999 on all the stats, so even if it's 4-byte, it's probably not necessary.)
The above has applied (as far as I can tell) to all the characters I've gotten so far - I'm just heading off for the second main mission to the north in chapter 1.
Hopefully this points you in the right direction to get at least some of those character stats permanently gained. Unfortunately, my cheat-fu is limited to find a value -> replace a value, so I can't directly help you with whatever you're doing to find this stuff in the script.