Another thing to buy is an DDS to match your specific weapon (if you haven't already). It's not expensive RuneScape Gold, and has a good offensive special that can minutely improve your performance (if anything it gives you the satisfaction of getting two good stacked strikes).

If you are planning on killing many times, strive to finish the Hard Seer's Village diary because the Excalibur Enhanced is a fantastic healing spec weapon (+200 pounds every 5 minutes is nothing to sneer at). It comes with some demands, but it's certainly worth it. If you're having any questions about slaying, feel free to join me in game (Dimosthimise) or post a message here on Sal's. Enjoy slaying.

Like they said above Fighter torso is the ideal choice, and you could be using it right now if you were to get it. In terms of legs, I personally prefer Verac's skirt for the prayers bonus (and its manliness). Even if you do not pray to complete your task it's a good idea to use up your base prayer points to get superhuman strength (+10% strength for the first portion of your task is pretty good), and the prayer bonus just makes it more powerful.

Regarding super sets the super strength and attack are essential on every task, but super defenses you might want to carry if you encounter a lot on one specific job. In all likelihood, super defenses are very affordable compared to other defenses, and they only concern with them is they take up inventory space.

Another thing to pick up is the DDS to match your specific weapon (if you don't have one already). It's not expensive RS3 Gold, and comes with a great offensive ability that can increase the speed of your job (if there's anything that makes you feel more comfortable with two hit combos).