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Smith does NOT need shadow. You can use DC as posted above. Bronze adds brings 60 fire to 100 and agapite brings 70 cold to 100.
Smith and stone need shadow, carp and bow need oak, I don't do glass so no idea.
So do you need a tinker / smith or just tinker to enhance a tinker item with a smiths hammer glad this info is being added
OP's call hah buuut if strictly looking for reforge numbers....Dull copper 60% (70% powerful)Shadow iron 80% (100%)Oak 80% (100%)Can still use old runic crafting, but you'll burn through more runics to get the desired effects than reforging unless the gods really don't like you.
Shadow Hammer works for getting 100% Element with Smithing and Tinkering weps (including Whips). If you're specifically after 100% Fire Weps, then you can use a DC Hammer, reforge a wep to 40% Physical/60% Fire, then use a +60 ASH to enhance it to Bronze to make it 100% Fire.