superheating: requires 4 fire runes,1 nature rune so get a fire staff equipped basically you make bars without a furnace mith bar mid 1,237 coal ore mid 183X4=732 (mith needs 4 coals) 1 mith ore mid 286 1 nature rune mid 233 732+286=1018+233=1251 -14 gp loss for 30 smithing exp and 53 mage exp per bar addy bar mid 2,335 coal 183X6=1,098 1 addy ore mid 1,092 1 nature rune mid 233 1,098+1,092+233=2423 -88gp loss for 37.5 smithing exp and 53 mage exp per bar