Does Slaver's Exile go in HM book if...?

I am doing all the dungeons on Hard Mode lately and was wondering does the Slaver's Exile go in your HM dungeon book, if you kill all other bosses at normal mode and kill Duncan The Black at Hard Mode? Anyone tried that? Thanks..

Yes, it does go in HM if you do that.

sure does.......

haha yes and its the best way to do slavers runs in general imo. when my guild does slavers we clear first 4 NM and then HM duncan after in a 2 hour total run... very efficient and fun farm

thanks guys, will make it easier for me