If you dont have slayer dart, this is the next best thing after it. Very cheap and good damage too. From what i can see, you should NOT be using 3 p pots per trip at your prayer level, at the max you should be using only 1 (maybe 2 if you are unlucky). What i suggest is you try maging guthan and Torag in melee armor (rune plate, kite and legs) without prayer. this way they wont hit often and you wont need to pray on them to survive. If you insist on praying, use Monk robes instead, they are better. If you absolutely have nothing else to use, use mage outfit. Mage outfit is next to useless in barrows because their mage def is so low that anything higher than +10 doesnt make much of a difference. Also NEVER try maging verac without using a melee armor, the will take too much of your food. I suggest also that you level your Ranged (kills ahrim quicker), Prayer (better prayer restored per dose) and Defence (so guthan, torag and Verac can hit you less)