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To lower your front-end cost and lower your cost of entry, consider getting an item called the Ring of Charos (a) OSRS Gold. Beware of using the 'pay option' when you are using foremans from the Blast Furnace foreman since it will invalidate the benefits of the rings. You can advantage this ring throughout The Creature of Fenkenstrain questline.
Adding Ice Gloves into the Blast Furnace...