Sunbreaker was over nerfed. The damage resistance and the health regen is fine the way it is now, its actually possible to kill a sunbreaker with some skill and good team coordination. On the other hand, Hammer of Sol just isn't lethal enough. The hammers take ages to actually land now, and when they do, they don't even do damage, and plus the duration of HoS is now super short, even with the Forgemaster. I think, Hammer of Sol just needs an improvement in lethality.