This exploit is ALLIANCE ONLY. Horde cannot use this exploit. This guide will explain how to procure a guardian pet that will tank and easily kill mobs during quests.
1. Do the questline in Redridge that ends with the quest: [Saving Foreman Oslo]
2. Accept the quest. Use the orb to control the Etin wandering through the canyon.
3. Instead of turning the quest in, keep it in your log.
4. Pull your Etin pet over any of the mountain routes that don't cross over the main roads that exit the zone.
5. Aggro mobs as you exit the zone through the mountains. There are lots of gnolls and orcs wandering around. As long as your Etin is attacking something as he is leaving Redridge, he will not despawn.
6. The guardian automatically goes back to full health after each mob pull. The pet is capable of getting some really nasty crits that can two-shot mobs up until the late level 20's.
7. If you die, you will need to go back and repeat the whole process over. The Etin will despawn on your death, but if the Etin is tanking, you probably won't die anyway.
8. I gained six levels in 1 hour, 17 minutes, 37 seconds played time on a rogue using this method.
Remember to pull the Etin through the mountains WHILST attacking a mob. This can be very tricky, but it is also very worth it.
Cheers!
aphel