Quite. Now, I have a joke statblock from Threadnaught, which I won't allow. Lord Draco's posts are based off of a poor understanding of the rules; we must respond by having a better understanding of the rules, and helping him understand precisely why a Wizard is considered the strongest class in the game. I don't know if in direct combat a wizard would win, because its power lies in one word: Mutability.

A wizard can change its abilities to suit the situation it is in; it can divine a solution, and use that to his advantage, to be prepared for his foe. This is direct combat, with less ability to change spell slots. Yes, you may still defeat him, but unless you have used something particularly cheesy, he has access to the same tricks, for the most part.