well i was having problems with that on my DH too, but i've followed this guy steps:
https://www.thebuddyforum.com/demon...5394-guide-2-4-1-unhallowed-dh-100b-hour.html
Take a look on them, it really helps. My dh still don't avoid too much the arcane sentry's, but all the other stuff is fine (when the game is smoother, around 12~15fps - ocasionally i get some drops like 2~5 fps for some minutes, and it runs a little dumb)
https://www.thebuddyforum.com/demon...5394-guide-2-4-1-unhallowed-dh-100b-hour.html
Take a look on them, it really helps. My dh still don't avoid too much the arcane sentry's, but all the other stuff is fine (when the game is smoother, around 12~15fps - ocasionally i get some drops like 2~5 fps for some minutes, and it runs a little dumb)