As you can see how I mentioned the word "Glass Cannon" several times, you probably would of guessed that Wizard isn't a class where you charge head strong into monsters. There is a lot of running around and staying far away from the monster (PVE) or people (PVP). And most of the time when you catches others attention (usually monsters are easy, but in PVP if other people spot you, you might as well just put down your mouse).
But on the up side, Wizard is extremely capable at dealing damage. It's incredible skills can really hurt your opponent (if they don't try to kill you first).
The reason I picked Sorcerer as a subclass is because to utilize it's DoT (damage over time) skills in combat. Since I do not have much of a healing problem when it comes to PVE, I went with damage output. At the same time, DoT is able to CRIT in this game, which makes sorcerer subclass a even better choice. And what make sorcerer such a great choice is NIGHTMARE TOTEM. It is such a godly skill in PVE or PVP. It saves lives, my life XD. Other than that, feel free to choose other class, as that CRIT wizard isn't like SPD wizard who might need gunsliner's SPD buff. Honestly, I can't really tell the difference if Sorcerer subclass really makes my dps more (we need that dps meter things). Just pick whatever you want and have fun with it!