You want to utilize all your ores to RuneScape gold make pubs which are utilized to satisfy the moulds which you've purchased. Make as many unstrung holy symbols as possible but do not market them into the general shop. Bank all of them instead and head to Edgeville. You will begin your selling trip there. You will need to go to the Bandit shop in the Wilderness as these thugs will purchase each of your new-made goods for 120 gold.
To optimize your farming be sure to mine rocks at the Varrock as it's the closest mine to the lender. Your Smelting can be performed at Edgeville and Crafting at Al-Kharid. For Ultimate Ironman, danger won't be well worth the reward so market everything to the overall store instead. Tiaras can also be made for a bit of profit, but in general they're better for experience than for coins. If you're on high enough Mining skill level, you can push this method to the maximum profit by mining gold ore and making Gold Necklaces as well as Gold Amulets. Those will lend you the ideal profit but with lower experience per hour.
This method involves choosing up Staff of Earth and Steel Platebodies in the ground and shifting worlds to spawn them again. If you're above 55 Magic you could also bring some Fire runes and Nature runes. It will let you utilize High Alchemy spell on staves and armor which is used to decompose items into the gold. With that you won't have to run to the store to sell your items after your inventory is complete. Remember that this method involves running to wildy and because it is a pvp zone that you might get caught by additional players - bring only necessary items.
Requirements: More than 30 Agility (51+ would be optimal), a weapon, waterskins and buy RS gold perhaps food on reduced Agility level. Although we researched this technique as a risky one, you can not get killed by others performing this task. The thing which can kill you is that the desert warmth combined with obstacles that may damage you.