With tetrahedrite and cassiterite you can make bronze, which will probably be your main military metal until you can trade/melt enough goblinite for steel. It would be faster to make it from ore, but your furnace operators get more experience from bars, and you have a shot at silver bars as an extra byproduct that way. I would personally do it from ore unless you're in dire need of legendary furnace operators.
If you're brave and foolhardy enough go straight for that sweet, sweet candy and skip the rest.
I disagree with smelt from ores as silver blunt weapons are more effective and you have a magma smelter. It is more time efficient to smelt from ores but then if you want silver war hammers or silver maces you need to dig either more tetrahedrite, native silver, or galena.