User blog comment:BannedLagiacrus/Monster Appreciation Week: Dah'ren Mohran/@comment-5043481-20150824123422

Like Jhen Mohran, but with a different design, some more attacks and much less health. Only time I've had trouble not killing Dahren was in the high rank quest More Mohran solo. Every other Dahren questhas very low hp, coupled with a huge weakpoint on his chest. Once you get to the final stage victory is pretty much certain as he'll just die. Even G rank ones.

I prefer Dahrens equipment to Jhens, especially the G rank armor, which can make a nice Greatsword set. And it has rock steady, which is epic. The SnS is very nice, and I use it quite a lot. 520 water damage on a SnS is awesome.

It looks to me like Dahren replaced Jhen as they had an awesome concept kicking around and wanted to use it.