This follows my other guide:
http://www.ownedcore.com/forums/diab...minute-so.html (Hell - act 1 - 16,5k exp + champion mob every 1 minute or so)
But does something else.
Once you have killed the champion and talked to Leah to get your quest done, teleport out and leave game. Now instead of switching the quest back to step 2, just click "resume". You will spawn in the cellar. There will be no mobs BUT the chests can still spawn. There can also be a chest outside of hut.
Login, run to open chest, pick up loot, port, logout - takes around 30 seconds or so. If there is no chest, even less.
Seems insane frankly.