Question for experienced Runescape players?

i have 54 slayer now and will have 55 by tomorrow. My question is what armor should I wear if i am planning on doing barrows using magic dart. Please give details. Also how many runes should i bring and inclued what order i should kill the brothers. 73 mage, 62 range, 75 attack, 68 str, 63 def, 58 prayer. What should my invy be too. Food type? Pray pots? Other gear? Thanks