Something that came to mind. For Best use of resources, wouldnt it be best to use gems to speed craft keys from Eveline? Think about it. 25 gems and you can have a key to open a chest, which is cheaper than spending outright gems to open anything. Seriously, 30 gems to open a wooden chest and 25 gems to craft a wooden key at the minimum from eveline. You should come out ahead to spend all your Ore to speed craft keys, open chests for more ore, and use that to speed craft more keys.
Which should net you a good loop and a ton of resources using this method.