I have 3.52% luck and just get Sheheramazond it took me like 2 days of constant fight with that Dark lord also get 2 dragon helmet and a dragon armor so if you give it time you should be able to get them.
so a question , how many different harem girls you can get from dark lord ?
if i have to guess it should tree kimie , arcana and Sheheramazond , if i am wrong tell me !