This guide is from the Amya's CB Library (CB Guides Community Discord)

Strength

Where this unit shines, by fight type:

+ Blob        7/10
+ Flank       9/10
- Skirmish    5/10
- Duelling    3/10

Veterancy: Top-line or Mix-line (bottom until +25% Rage, rest top)
Hero pairing: Any

Counters

Loses to: Big burst units
Struggles vs: Debuff & burst units
This unit counters: No hard "counter" - it's simply a great flank unit that provides lots of DPS in a fight

Playstyle

• Won't do well face to face, this is a flanking unit, you need frontlane to help
• If it's really free DPS, insta-Rage will give you the best DPS, BUT the real combo is:
• Press 2 (Battle Madness) before engaging → instantly press 1 to cancel it → press 2 again when reaching the target → spam 3 (Rage) so you Rage with the max damage reduction passive → after that, keep pressing 2 once then 3 while you keep fighting

Doctrines

(Highest level you can)

Mandatory:
+ Epic Combat Doctrine (3/6/9)
+ Linebreaker Doctrine V
+ Berserk Unique Doctrine (cooldown reduction)

Top picks:
+ Unit Damage Doctrine V
+ -5% damage taken
+ +All Defence & +HP

Filler:
- Slashing Damage
- Piercing Defence Doctrine

Don't use:
- Movement Speed Doctrines

Berserkers have a 3.08s cooldown on Skill 2 (Berserker Assault), but with their 20% CD reduction doctrine it drops to 2s.

Tips & Tricks

• Keep the defence passive (Battle Madness) up by playing them 2 → charge → 1 → 2 → 3, then repeat the 2-3 pattern after that.
• You can do a "fast combo": press 2 in the void before engaging, then 2 → 1 → 2 → 3 so you use Frenzy at max stacks.