Slaying skill consists of killing certain monsters based on the player's Slaying level via Slaying Tasks.
Slaying Tasks can be obtain by either talking to Prince Desmond located in Crendale Keep or simply by typing /slaying command.
Slaying is very profitable early on, it's recommended to know the best spots for each of the slaying monsters or a player could ask in the global chat to get a response.
Slaying Encounters and Best Spots
It's recommended to map switch if the respawn timer is too long.
Use the best spots to speed up the slaying farming.
You could also set respawn in different location to suicide and respawn faster.