We all know it, in general Power Words are next to useless. What should be some of the most feared spells are pretty much a joke in ddo. I would like to suggest a simple addon to the spells that creatures outside the regular limits hp wise have to make a save (would suggest a -2 penalty).
Just for a quick comparisson
Death spells:
FOD level 7 is used far more then PWK
Wail is used even more due to mass effects but close range
Both Wail and PWK are both level 9 spells but who would use PWK as is?
By giving PWK an effect with a -2 penalty it gives it a bonus over FOD (believe it is shorter range though) and a reason to use it over Wail with its mass effect.