I've got lvl 99 slaying and I found personally, that I averaged about 20k exp per hour. It really does depend on the tasks and how well you're equiped. Certain tasks just aren't worth doing, such as Jungle Horrors. The equipment you use is vital such as a black mask, superset, guthans and even a cannon. For the best tips, check out Axe Man Jack's thread, which is the best guide i've seen anywhere. http://forum.tip.it/viewtopic.php?t=412 ... ght=beasts