Remember that is only an idea for equipment it is always possible to change things up. For example, you can change your defender to Obsidian's shield if consider you require an additional protection, and RS gold it is possible to use dragon platelegs, if you do not want to be repairing the armor on your barrow, as it gets damaged in battle.
In addition, if your possess the required quests for the helms, GET THEM. If you intend to perform any kind of slaying, you must complete your Smoking Kills quest as soon as you can. Don't be afraid to try out different techniques and see what works for you.
This entire setup will cost around 2-2.5M which is an excellent configuration for slaying. Remember to also use buy Runescape gold some of that cash to buy super sets (Super Strength/Attack/Defence potions) that you should be using on ALL your slayer tasks.