You want XP or GP? For XP go with nature runes. You can get to the altar with summoning (I doubt you have it on your pure, but maybe your main) or you can teleport there from the abyss. If you have the ancient magic spell book you can carry runes to teleport to edgeville. If you don't, carry some glories with you. I think the natures pay off the glories.
For cash, I'm not exactly sure. It definitely depends on your level. What is your level right now?