I find a way to make as many "Golden Whetstone" as possible. It's quite essential to multiple the damage. The idea is that "Star Potion" can be made from "Cauldron" and can produce "Golden Whetstone". So by leaving one monster unhurt and repeatedly use "Old Log" and "Cauldron" to make potions, it can make about 3-5 "Golden Whetstone"s just in a single battle, before the monster's damage exceeds 1000. Hope this would be helpful!
