I'll have to disagree with this suggestion. It's still easy to kill people even when they have all those gears equipped. And lets not forget that equipping this headgear gives disadvantages as well. You no longer have the forsaken king set on so you can freeze unless you give up an armor slot, you give up an additional headgear slot causing you to no longer have 4 kiels and/or be vurnerable to stone curse. You do no longer have the forsaken king set bonusses/stat bonusses of the helm. Meaning you'd need a damn lot more agi to get to max aspd while wearing this hat.
All of the above combined I think the hat has more than enough disadvantages as it is and in return it gives a decent amount of reductions. Without the hat the gearset Sacred, skull aura + friggs remains which is easily killable.