Yep, if you are doing full run it'll take bout 4min. But if you only clear all the mob till the boss room (Djiin room) its only take 2min max (Using Mage 75 Full equips and x3 Combo elixir), and with liquidating all drops + gold, you'll get about 800-1100 gold depending on drops. So 60/2 = 30 runs => 24k-33k per h. Farming with 2 or 3 peeps will reduce the time and increasing your gold.