Ok the hunter is more suited for long-mid range weaponry and mainly deals with stealth and taking out enemies from afar. Titans are tought and mainly work with special weapons like rocket launchers, shot guns, and machine guns. They mainly deal with hitting an enemy fast and hitting them hard (mainly at close range). The warlock is the support and heavy hitter. It can use the nova bomb to blow away large groups of enemies from a distance. Mainly deals with mid-close range weapons (rifles, pistols, ect). Have more damaging or effective abilities than the other classes. This is at least my take of all the classes.