Don't choose a Wizard? The class early on is awesome, later on is just terrible in comparison to a Warrior.
Me and a friend started at the same, me being higher level we wanted to see how powerful he's become with his equipment he got once near the end of hard mode, he could kill me in a single hit and the flames I could cast that could be laid across the ground he could walk through those all day long.
We didn't play much after that, just finished hard. But the way that I stood back throwing down spells and him basically being the tank, the game was way too easy even on hard. How overpowered the Warrior is I'm pretty sure he could have taken hard on his own.