Summary: A bot that has 2 jobs. Staying on a certain square(s), and attacking a certain monster. A lot of extras can be added. Potting, telegrabbing loot over X value, alching loot etc.
This could be used for slayer or just combat training in general. If you added webwalking as well, and praying/eating (While running to safespot) this could be utilized to farm gold as well, blue drags for instance.