Among Souls players this battle rages -- and it's a strange one. For every boss someone finds difficult there's a smug bugger who claims they beat him/her/it first go. Personally, I found the Ruin Sentinels the most difficult, but one smart guy has managed to take the official death figures and work out once and for all who is actually, statistically, the most difficult boss in Dark Souls II. You might be a little surprised.
Apparently it's King Vendrick, closely followed by the Ancient Dragon. Both, interestingly, are optional bosses.
In fact, until I read this Reddit thread, I had no idea that you could even fight King Vendrick. I assumed you couldn't. Apparently on average players will die nine times before killing him. Bear in mind this also includes stats from crazy high level players who replay the game over and over again (just in case you're feeling a little insecure about your Dark Souls skills).
The top 5 is as follows...
1. Vendrick 2. Ancient Dragon 3. Royal Rat Authority 4. Darklurker 5. Smelter Demon
Personally I'm a little surprised that the Gargoyles boss fight isn't higher. Anecdotal evidence seems to suggest that most people found that and the Smelter Demon boss fight the most difficult. By far those are the bosses that most people complain about in my experience.
Who did you find most difficult? Let us know in the comments below.
Check the Reddit thread for a more detailed breakdown.