Is the barrows set special designed to only work when you have the entire set? Are there any activities you'd say is worth doing and RS gold is fun? For slayer, I heard that the Cannon can attack and that you can also attack. Do I need to carry one for every job? What will my inv. look like for Slayer? What does my inv./gear look in bars (Black sallies) What do I need to do it? Better to...