Because every warlock and their mother used Sunsinger with the exact same perks/nades. They looked at the raw stats of how many people used Viking funeral/firebolt and decided it needed a change. Pretty simple. Same happened with tripmine grenades, in which more tripmine grenade kills occurred over the passed year compared to firebolts. I used sunsinger a lot too, but I always hated firebolts. Always mained voidfang and fusions, so the nerf largely doesn't apply to me. Try them fusions out. Pretty dang fun with voidfang/gift of the sun. [spoiler]not saying you never used fusions, just saying that with the right play style sunsinger is still pretty strong[/spoiler]