His guide is in the Archive of Wisdom. Looking at your stats, I'd suggest something more like wearing Torag or Verac top and bottom, a glory amulet, Farseer helm, Guthix or Zamorak god book, RFD/mystic gloves and rune/mystic boots, and a god cape. Rune arrows are good. Guthan's good, if you can afford it. Bring along in your inventory red d'hide top + chaps, a whip or dragon scimitar, runes needed, magic bow, one-click teleport or a Camelot teleport, runes and prayer potions. You don't need a magic potion, replace it wirth a prayer potion or more food. You're pretty close to 55 slayer, so I'd say get that so you can use Slayer Dart. You'll hit 16s and get the runes you need from chests. But if you don't want to do that, then get the Chaos Gauntlets from Family Crest (pretty easy quest) and use Fire Bolt with those equipped. You'll hit 15s, one lower than Fire Blast at half the price. You need to kill all six brothers to get a Barrows item. The kill count increases the amount of runes, coins, and racks you get. I suggest a kill count of 14-20. At your defense level, with the right equipment (Torags/Guthans) you could get away without praying on Torag, Guthan, and Verac. Dharok and Karil always need prayer, and Ahrim might need it. But I urge you as well to check out Saru's guide for Barrows. I'd use it myself if I were still a member. :P