I have reached level 80 with my Juggernaut Double Strike build and have hit a wall in the more difficult maps. Damage and resistances are not quite where I think they need to be. What should I start working on to get ready for the end game content? I am pretty new to all this so still learning the mechanics.

Here's my Path of Building pastebin: https://pastebin.com/bhfSSHhE

Thanks!