You must be unaware of the ranged shockwave that they can send out that's just as effective as the shockwave perk on Fist of Havoc. If Sunbreakers survive sniper headshots or Golden Gun shots, they're using full armor spec and probably are wearing the new chest pieces that give you extra armor while using a solar subclass. Titans have more armor than crazy agility hunters? No wayyyy! I believe this was tested many times. At full armor spec hunters have up to 198 health. At full armor spec titans have up to 200 health. But do hunters run full armor spec? No they don't. They usually run full agility or recovery, which means their health will normally hover between 180-190. http://planetdestiny.com/does-armor-matter-pvp/