I'm not sure if many people know this, but there is actually an end for the discovery sky mini game. So instead of wasting hours trying to grind a stupid mini game, you can actually just teleport to the end. If you set your coordinates to (100 000 , 1000) using the Nexon'd Trainer, you will end up on the last platform and you can talk to the npc and instantly get 1250 ark points. You can keep spamming it until you get 200 ark coins. Hope this helps!