Kind of a noob tactic..(One i've used before though :P) But even still, you have to get up close and personal, and if they are any kind of a good player, that's most likely not going to happen. Shitty sunbreakers aren't the problem, it's people who KNOW how to run PvP tactics, and KNOW that the Hammer is entirely overpowered. A shitty player will always be bested, no matter what strategy they use because they simply cannot perform under PvP pressures. But even so, it has to be a remarkably shitty player to not be able to pay attention to their Tracker and the good majority of Titan users are, at the very least, kinda good. And that, coupled with the ridiculous strength and Health regen, and armor of a Super-activated Sunbreaker makes them infinitely harder to kill, even at mediocre levels.