The Wrath of the Berserker skill effect duration can be extended when using the Thrive on Chaos rune:
Every 25 Fury gained while Wrath of the Berserker is active adds 1 second to the duration of the effect.
What is a good build (actives/passives/items) to maximize the time spent as a berserker?
Best Answer
I do not have a specific build, but here is some advice and skill selections.
Fury is gained in several ways:
So for max fury gain, you want to attack quickly, focus on fury-generating skills, and take damage. This last point may mean you avoid armor and skills that add damage mitigation, and perhaps focus on life-regeneration instead.
Here are skills that help gain fury:
Passives that gain fury or help Wrath of the Berserker:
Follower skills:
Since many of the above skills deal with either per-attack or per-enemy-struck bonuses, you could specialize multiple builds, for keeping Wrath up when fighting bosses/elites, or fighting large swarms of monsters.
I don't think you can continuously generate 25 fury a second to keep Wrath up for a long time, but I think you could have great success activating it and then unleashish some big/AOE attacks to generate enough fury for 5-10 seconds more fun. And so you take Boon of Bul-Kathos, you might be able to keep Wrath up for 25-30 seconds out of every 90.
If I were to try to create a build out of all this, I think I would go for the critical hit synergy. Wrath and Berserker Rage both give you more crit chance, and Into The Fray turns crits into fury. Overpower can be cast more often if you crit a lot, and it generates fury every time it strikes an enemy (Momentum). Throw in Frenzy and Animosity for constant passive fury generation, add enemies to taste, blend well, and enjoy!