You don't really need 80 defense at aviansies but it might help you a bit. You also need a saradomin item. Change out the barrow gloves for set of zamorak vambraces and and get a saradomin d'hide body. That's the cheaper way to get the same effect. You need climbing boots to get there, too! Other than that, you're set. Inventory: 100 natures, fire staff, games necklace, few k mithril bolts. Don't forget B2P! Fill the rest with monkfish and you're set.