Go to the agility pyramide, bring some food, eventually some antipoisons, i don really remember how it works exactly. Bring mediocre armour, but the lighter the better. Go into the chambers till you find the mummy, then start the activity, go past the first traps, then search the golden chest in the middle, find the door to the next level, do this until you are 2 levels away from your highest, then search the urns or seach for snakes, i dont remember which of them, you ll probably find out if you read a good guide. Then rinse and repeat. This is probably some of the fastest exp. Blackjacking is also a good bet.