So set your quest to siege breaker, then run through the Areat gate and out onto the field. There are 3 possibilities of rep. chests here; 1 in each of the random spawn dungeon, which are almost mobless and super easy. Each spawn with or w/out treasure goblins and usually a chest. There is also another one in the middle of the map (randomly) atop the castle thingy. Next to the dungeon. The dungeons are The Forward Barracks and Cyriders Outpost I believe. Good luck! You usually dont even have to kill anything to get the loot.

---------- Post added 2012-06-16 at 04:49 PM ----------

And don't forget about dat magic find.