First off, it's a struggle for me on some of these dungeons, so when I make it to a spot where I can't get through because of plates it's really frustrating. That guy in Direfrost keep could have met me at the front door instead of a few mini-bosses in. I also fought through Blackheart Haven and had no chance on the final boss. Is that a L2P issue or is that guy always going to turn me into a skilless skeleton and then kill me before I can get any skills back? If it's a L2P issue, I'm fully in support of that. I actually miss games that let you go right to the bosses and get your butt kicked. I just don't want to work my way back to Captain Blackheart if it isn't actually possible to complete the dungeon.
So which dungeons CAN'T be completed solo because of boss mechanics or levers? Also, if you have tricks to get by these things, please share.