Running away is not a real counter. Imagine a super that projected a bubble in a 20 metre radius around your character that moved with you, and no one could enter this bubble without being killed. That would be OP as hell, especially in objective modes, yet that's essentially what HoS does. All it needs is a reduction in damage resistance down to the same level as Bladedancers. That, or remove the option to regain health on the ranged hammer throws (make it melee strikes only).