Grinded some castle ruins recently because I needed red shards and I don't like orcs. First 2 hours we made 2.2b not including market and valuing red shards 10 million each. Thought castle ruins is still decent despite what people say. Then the next 2 hours we made 1b. So in total 3.2b in 4 hours. What needs to be mentioned though: this was with 400% drop rate capped +arsha +castle. And I the lowest geared person in the group was me with a 305k Shai. It's about the best case scenario for making money and it only resulted in about 750 mil per hour. If you don't get carried on orders like we did in the first 2 hours and don't have that high drops rate buffs it's a complete tragedy of a spot only making you around 400 million per hour.