There's also the option of an armamentarium that you can try as a stand-alone item, or in combination with all or all of these OSRS Gold. Of of course, there are many other locations, but I'd suggest this one for sure. I just realized that the title states greaters, however the article states less.
If the challenge is more difficult, my sole suggestion is to go to the brimhaven dungeon. It is possible to use any of the above options however, you must fight the terror dogs as well. Unfortunately, there's not a variety of options that are great for the larger dogs (no no pun meant) however, you must continue to fight in the event that you encounter those.
Go to Lunar Isle and use the pure essence on the altar until you're proficient, then sell the runes on the Great Exchange, repeat. When you have reached 82 Runecrafting and you'll be able to create two runes for one essence, thereby increasing the profit by twofold. Astral Rune is needed in Dream Mentor quest.
Crafting Law Rune is not available until the achievement of Runecrafting Level 52. You must complete your Buy RuneScape 2007 Gold Troll Stronghold quest (required skill levels 15 Agility, 30 Thieving and 43 Prayer) to unlock the Law Talisman granting access to Law Altar.
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