An alternative way of leveling at this point is performed by buying gold ores at Blast Furnace and smelting them into the RS gold necessary bars to create Gold Bracelets. They'll give you massive amounts of Crafting experience and can be later dissolved using High Alchemy for a small return and additional Magic experiences.
As you are an Ultimate Ironman, your options are even less extensive. The best option in this situation is to go to Port Phasmatys and bulk buy soda and buckets of sand. After that, you should head to the furnace located near the port and melt them into molten glasses to make glass items. Always aim for the highest grade item. You can increase your skill level to maximize the amount of experience gained. After crafting your items, make them available for sale in general stores and switch to another world to replenish your store.
Farming Seaweeds. In the underwater portion of Fossil Island, players are able to plant Seaweed Spores in Seaweed Patches. Seaweed Patches. Through this method, they will grow Giant Seaweeds. Harvesting these patches is quite profitable since there is a Giant Seaweed equals six smaller ones. The adventurers who would like to buy OSRS gold employ this technique will need to look for Flippers and they drop from Mogres at the ratio of 1/64.