Play "The Legacy Of Cain - Explore Cellar" quest in Act I. Take the waypoint to The Old Ruins and go north, then east. Go down the cellar to encounter a named mob (Captain Daltyn) and his minions. Kill him for at least one magic item and some coins. Loot the cauldron for at least one health potion. Talk to Leah for quest completion experience and gold. A loot chest also appears 40% of the time. Exit and repeat as many times as desired. The pathway will never change, but you will keep hearing a Tristram Militia whining about how he promised to save Marko but did not. To earn XP, gold, and items quickly, start Act III: 7 - Kill Azmodan. Skip past all the enemies except for elite mobs. Defeat Azmodan, and skip the cutscene. Teleport back to the stronghold after taking its soul and your loot. Then, talk to the guard, speed through the dialog, go to the armory, and then the watchtower. Skip the cutscene, then run through the portal. Go to Tyrael, skip through the dialogue, and go through the portal. Skip through the additional dialogue, and then kill Iskatu. Repeat this process as many times as desired.