The titan can work as well as the other two classes. You have the highest jump available and a strong melee. The only difference in the melee is the titan reach is a little shorter, but there is shoulder charge. I play striker subclass because there is nothing better than wiping 3 + people capping a flag or waiting at the heavy ammo box. It just depends on your play style. I use all three characters and Titan is my favorite when I PvP. Understanding the maps and how to fully utilize all of your abilities is very important.