Gear for reaper
I’m using Berserker’s as well and do just fine. But yes, some mobs in the new maps will hurt a lot if they hit you. I recommend using a couple of more defensive traits and utilities if you feel you are struggling to much (e.g. Foot in the Grave and Blighter’s Boon helped me out a lot when I ran around on my own). Also, have a Staff ready in case you can’t fully melee something (up-scaled champs and stuff like that) and an energy sigil on your secondary weapon is also pretty nice.
Run Zerker for PvE. If you’re solo (and struggling), go Spite/Death Magic/Reaper (or if you don’t have Reaper, Soul Reaping) and whip out some minions, you’re going to have a much easier time