I don't think they should be nerfed, just fixed. What bungie should do is decrease the damage reduction by 5% and make the health regen stop when you get shot. The health regen on sunbreakers is stupid op, we could have two people shooting at a sunbreaker, he kills one person, and regens all his health even though the other person is STILL SHOOTING HIM! How is that not broken? Every other health regen perk stops immediately when you take damage, except the sunbreaker's. This needs to be fixed