What are your opinions on DS2 bosses?
Let answer this,
First of all i'm playing the vanilla version not even Softs let alone the DLCs. In my opinion, The difficulties of the bosses are different depending on your built and ofc your SL.
For example, when im playing as a sorcerer i find it really hard to beat Mytha (she pissed me off even more at NG+2 ) but as a melee, it was OK.
Then as a melee, the rotten proves to be hard while fighting this dude as a sorcerer was piece of cake.
And during my first playtrough, The pursuer made me almost give up this game until i found a way to cheese him. But now after learning his attack pattern, i can defeat him without cheesing him at around 40-50 SL.
Still the hardest for me in any build is The Duke dear freya since in the vanilla version the torch doesn't make the small spiders go away but they keep attacking you. Freya Ng+ is a nightmare.
Honorable mention for another hard bosses for me are Smelter demon, Dark lurker, Vendrick, Throne watcher and Defender.
Nashandra is a piece of cake which is disappointing for a last boss standard.