You're an idiot. Sunbreakers are easy to kill. I see it happen all the time. I kill them all the time. I don't run as a Sunbreaker in crucible, I go in as a striker (occasionally a defender). Snipers work just fine. So does Fist of Havok. Shot gun to the face works well also (just as easily add it does for blade dancers). Lightning grenades, storm trance, golden gun, should I keep going? If you're having problems killing them, then I suggest you "git gud" son.