Dust devils are a fantastic slayer task. Using the method detailed below, you can receive up to 300k range or mage xp/hr and 50k slayer xp/hr while recouperating most of the supply costs on drops. It is recommended to unlock the dust devil task extension and equip bracelets of slaughter in order to maximize the value of this task.
Best range or mage gear
Slightly different setup for slimes: