[3.1] MoM Firestorm Berserker - Beginner/SSF/League Starter - All Content (Videos)

Playing very similar build as yours and having real big problems with DPS. Clearing map's is fine but bosses are taking so much time. What do you think I can do with it?
I know I have to lvl gems but that will not make my dps 3-4 times bigger as I wont.

Swapping conc for cascade for bosses. Having no problems with survivability though.

https://www.pathofexile.com/account/view-profile/Zloezlo/characters

A few things:

* Conc Effect is one of the best support gems for single target in this build. I haven't tried Spell Cascade yet, but you don't want to give up Conc Effect.

* It doesn't look like you have Arcane Surge, nor any way to reliably activate Elemental Overload.

* Xoph's Blood will make this build much, much stronger. It's expensive though.

* You don't have a helmet enchant for Firestorm duration.