Board Thread:Dark Souls II/@comment-28684144-20160607210819/@comment-124761-20161001110424

Personally I think 1 had easier bosses. I can reliably solo every boss in DS1 except the BS Four Kings, whereas there's a few I still have trouble with in 2. I dunno, maybe strength characters are OP in 1.

Anyways, to answer the question, pretty much all the optional co-op oriented places. BS enemies, bad environmental hazards, and terrible bosses although I didn't mind blue Smelter honestly. Those stupid horses in the Frigid Outskirts have a moveset worthy of a boss and I've never been able to stay alive against two of them. Yeah, don't solo these areas unless it's a pride thing...