LRC superheating, you need to have a higher mining level for it however. 80 mining, 55 magic and 40 smithing. You will need gold smithing gauntlets as well. If this is too taxing, you can smith gold using the aforementioned gauntlets, which should be a smaller loss. You can look at superheating other ores as well, take a look at grimy's spreadsheets at xp waste. Just google that, you will find a link. Good luck.