I spent 5k on a dungeon, and the loot was meager even for me - I found the first pile of gold on day 115, and it took me a day and a half to get to the only chest - and that was with only 3 heroes. The mini-conservatory on day 112 helped, and I somehow managed to survive until the second week with a stack of liches and them in the portal. When I encountered the AI, there was a block of 50+ air units, so I retreated and unexpectedly lost an angel with 50+ griffin riders to a shrine of level 3. Thanks for the game.