Best defense against Sunbreakers are simple, just run from them and if you are close try to jump a lot. I mean, everytime I hear a Dangerous super activate I try to run in the opposite direction. I do not for once think I can be fast enough to take down a super. Stop complain about every class. It can always be countered. Except for Crucible lag, that is the worst. When players warp as fast as Taken do, then it's scary for real.