Frost Dragons; 3m an hour. Regular anti-fires are sufficient however, you may need to consume food. Try using a knife. The RS gold main problem with this is that it requires 85 Dungeoneering and probably some magical notepaper. Kill the QBD, ascension (gladii and roarii) until the drygores become in stock. Continuing with warbands until 96 Herblore is also wise. Continue with QBD...