The final part of act 3 needs to be toned down

Act 3 was halfway easy, enemies hit hard. After the snake woman with the soldiers surrounding you I forget her name. My friends took off to the aggorat, I had no idea where to go and trying to follow their arrows for me killed. It took me about 5 attempts before I can on here raging (I apologize for that) but it was ridiculous, the end of act 3 needs some balance, I went from overpowered witch to punching bag halfway through act 3 lol.
I'm on cruel now thanks to help from a friend actually killing stuff at level 47.
We will see how the 2nd time around goes lol