Defeat the spider Boss in Everlight Temple. Use the elevator to exit. After you 
have the Netherworld Gate to this zone unlocked, return to the temple, and open 
the secret room at the top of the stairs by using the Overlord switch. You can 
collect at least 1,000 gold from the treasure chests inside the secret room. 
Warp to Nordburg Town Gate 3 to reset the temple area. You can also loot the 
treasure chests next to the Tower Gate. Go back and forth between those two 
areas to get easy gold.

Enslave both Nordberg and Everlight for large chests of gold that spawn when the 
area is reset. Teleport between the two to collect from both and reset each for 
your return. Each set of chests contains at least 1,000 gold. Note: You must 
completely dominate a town to get 1,000 gold from chest spawning sites. All 100 
citizens must be enslaved; for each 10 citizens not enslaved will result in 100 
gold being subtracted (for example, 90 people enslaved results in 900 gold).