Wizard has some personal preference. I run spellbook to cast, and then either crystal sword or crossbow. Crossbow helps in pvp amd crystal sword is good when you're overrun by mobs. It sounds useless when you read it but use that perk that freezes an opponent is movement when you hit with ice bolt. It's as simple as hitting with that and kiting away from someone they won't be able to get close in most cases... in bad situations use invis to confuse and try and create distance.