You can get around 1400 per hour with a pack yak at your own altar. Below are popular methods: Big bones: 73.5k xp/hour, 901.6k gp/hour Babydragon bones: 147k xp/hour, 2,464k gp/hour Dragon bones: 352.8k xp/hour, 7,422.8k gp/hour If you are trying to get 1m xp, here are the associated costs of each bone type: Big bones: 13.6 hours, 12.3m Babydragon bones: 6.8 hours, 16.8m Dragon bones: 2.8 hours, 21.0m If you value your time between 0gp and 662k per hour, you should use big bones. If you value your time between 662k and 1,050k per hour, you should use babydragon bones. If you value your time at 1,050k per hour or more, you should use dragon bones. My earlier 500k/h statement proved to be false.