Good luck. You are wasting your time if you're doing it through laws w66, however; it's slow and expensive. ZMI altar is the way to go - more exp per hour and a decent profit per hour. If you find it repetitive or boring then go to the ZMI altar world 70. There's plenty of people there. Plus side, you can sell the leftover runes to buy more pure ess once you've reached 91. Anyways, you'll learn to like ZMI once the new January update comes since trading runes for pure ess will become obsolete and "unbalanced".