Rather than removing the rare loam to "balance" the rares to Expert spell/combat art issue, why not change the combines such that the rare loam is used for fighter only Experts and use the rare hard metal (such as Incarnadine, etc.) for the scout Expert upgrades? That would make the demand of rares from Ore the same as rares from gem nodes (or a lot closer than they are now, at least.) I suggest loam for fighter only because loam seems to be a main Alchemist componant as opposed to a metal being a main Jeweler componant, but either way works. Just stop using loam for BOTH fighter & scout upgrades. 
