You mean The Great Orb Project I presume? No, I'm confident he does mean Fist of Guthix as there you can buy the elemental gloves, bar fire, wich double the runecrafting experience while crafting the runes. He suggested Earth Gloves as the price for each set of gloves (air, water or earth) is the same, the effect is the same namely 1000 essence doubled, while the bonus experience is much more. (6500 bonus compared to the 5000 bonus of the air gloves.)