To be honest, I'm very far away from a level where I would need to worry about bishop skill books. But looking at the price of Genesis 30 and 20, it's pretty crazy. Also, the fact that 30 books tend to fail a lot more, even though, on the description it says there is a 50% chance of success. But in reality it feels a lot lower, like around 30% success rate. I wonder if its true that they have wrote fake details on book descriptions. But regardless, you can live without a maxed Genesis, and still remain strong enough. 1hko Skeles is probably quite difficult without that, though. Maybe it will be easier to 2hko them most of the time, without having to pass a Genesis 30, but just Genesis 20 or so. The arch mage books are a lot cheaper, but personally it doesn't feel like a valid excuse to be an Archmage just for the cheaper books and stuff. Arch mage, for me, always seemed to be only a good choice for loners who don't mind almost never being able to join parties, and don't mind having no party buffs. But, I'd never make the absurd claim that, anyone who chooses an Arch mage is an idiot. Its okay. Some people like that class and don't mind the disadvantages.