The "x.xx seconds per (mining/smelting/forging/enchantment/sell)" can't drop below 0.07 seconds. If this number is correct, the achievement for selling 512.0m items at very expensive is only reached after selling for 414 days on 0.07 seconds per item.... I think this must be a mistake right? Also The scaling of gold needed for upgrade after about 2.1k levels on auto-mining/forging/smelting is not balanced if you compare to gold earned for the items sold at that level. ATM I have to wait for like more than a day to upgrade to next level gear forging if I want to do it efficiently. Hope you can have look at these tips. Good game!