There's lots of ways to play the game, but what worked for me was using the spirit skill, and putting all those points toward getting the liche king spell. Then I continued to build him up - and being able to summon him made the game almost too easy. Although the game lets you at some point have a second mastery, I think its better to stick to the one and just keep making it more powerful. If you don't like the skill you chose, you can change it in town for a price.
If you're comfortable with using a club, I don't see any reason to change to something else (unless you just happen to find something fantastic). Keep building up your strength and dexterity so you can handle the better clubs as you come across them (or buy them).
"How could drops of water know themselves to be a river? Yet the river flows on."
- Antoine de Saint-Exupéry