For people who wondering how to get decent money, here's what i do: Just spam level 12 (trojan horse) on hard or epic difficulty. Its not that hard if you have maxed mana and maxed shield, just save your mana and use the shield spell once the horse appears, you will be more or less invincible nonstop from the time the horse spawns to the time the base dies. Doing this i get about 70-80k gold each time and it takes about 3-5 minutes. NOTE: You do NOT need titans to do this.
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