no lol. i wish. 3lmc human / elf armor (studded/bone/hide) can not be converted at all. You need to make stone. if your doing basic imbued yeah its the same, but if you want a competive suit valorite runic malets are insanely expensive, and thats if you can even find them. Even copper runic mallets run around 200k per charge, while copper runic hammers (human equivilant) run around 10k per charge. can use regular smith valorite runics for the earrings, but thats about the cheapest peice your gonna make for a garg suit.
stone gargoyal artifact shame loot is also much more rare to find simply because its not available on all the places high end loot is farmed.
You can alter human glasses, plate arms / tunic / legs. its a good option in some cases, like for a mage/caster, but not if your going for a 55lmc thrower suit. youd max out at only 45 lmc in full plate. which really isnt viable at all for a thrower.
id love if all human armor were convertable, but that would also destroy the market for runic mallets (which are insanely hard to get thru questing and dont come from doing bods) I feel the whole armor system would have to be carefully revamped to balance throwing on a human / elf. that, or as i said the easier fix would be to allow throwing on human/elf, but just make them 2 handed so you still have to have to waste an imbue slot if you want to chug pots.