Maybe not the best and sure not a fast way. On the beginning I try it often (the 2 first battles) and let my Hero no learn such secondary skills that he get later as hidden skills. It needs some times and patience but then I have Pathfinding, Fire Magic, Earth Magic, Wisdom, ...
but I had no idea I was worth over $1 million at the time. I was too busy building a business at work, managing a rental, remodeling a new home, and figuring out how to keep things going.