Skills

These are mayhem berserker best in slot skill for the raid build.

Chain sword serves two purposes, first as a self-buff and second as a counter skill. both vital point strike and swift attack prep provide self-buffs for crit rate and attack speed.
Red dust is an important skill that amplifies damage done to a target. Hitting red dust will grant 24% attack power for 6 seconds. damage amplification provides a 6% party buff when hitting the skill. 800-900 Swiftness with at least a lv6 cooldown gem can almost keep the debuff up permanently with just 1-2 seconds downtime.
Due to mayhem, hell blade does even more damage due to deadly blow tripod. It is one of your highest damage skills. You can also use it as a gap closer after dodging mechanics.
Strike wave damage varies depending on the hit box for bosses. The skill deals damage in 4 successive strikes in a line extending outwards. Some bosses require certain positioning to get all 4 hits in. Other bosses, no matter what you do, can only be hit 3 times.
Finish strike offers high damage and high Stagger. The first row skill tree, tenacity, offers push immunity, allowing you to ignore certain soft crowd control patterns.
Sword storm is used by mayhem berserkers only because of their 3rd row skill tree, flame storm. This causes bonus damage when the user is below 50% health, which is always active. Quick preparation is taken over vital voint strike to fit into the optimal damage rotation.
Tempest slash is a decent damage and stagger skill.
As you require no fury meter gain, berserk fury is used as an awakening skill over chain of vengeance.

Runes

Runes enhance skills by providing bonuses such as attack speed or cooldown reduction. Runes have limited availability and you cannot acquire them from the same source twice. For some runes there are 2 sources and as such, you can acquire two of the same rune. Therefore, it's important to place your runes on skills wisely. above are the recommend rune placements for mayhem berserker.

Bleed works best on skills with low cooldown. For berserkers though, we are putting it on red dust.
Galewind should be applied on almost all your damage skills when we get enough rarities of them in the future. Most of berserker's skills have a long cast time.
Wealth is useless as you can enter burst mode immediately.
Quick recharge helps you with a chance of reducing the overall cooldown of skills.
Purify can be slotted on any skill just for the chance of removing a debuff.
Overwhelm helps increase stagger damage done from skills, but it's mostly used as an alternative if the other runes are not available.

Tripods

Skill tripods is the biggest damage boost to your skill, so you should prioritoze getting them first. Focus on finish strike, strike wave, and hell blade, these 3 are the main damaging ability.

For finish strike there is an optinal tripod called tenacity, which offers Push Immunity, allowing you to ignore certain soft crowd control patterns.
For tempesh slash you can go driving hit or storm slash, either is fine. Driving hit does less damage but have faster animation, while storm slash does more damage but have longer animation.
Sword storm can be equipped with the crit rate tripod called vital point strike if you cannot optimally use your damage rotation or if you have a high enough swiftness.

Skill Rotations

Gameplay: Tip: you can use dark rush for push immunity.
Engraving: You can replace mass increase for cursed doll if you don't like the -10% attack speed.
Beginner card set: This card set help new play deal with the low health problem mayhem berserker have since it give a lot of defense.
Budget damage/crit rate card set
Best in slot card set: This is the best in slot relic armor set for mayhem berserker as it negate the mana problem mayhem berserker have and provide a flat 45% damage boost at level 1.; Above is the ideal stat for a mayhem berserker. You want at least 1200 in crit but no more than 1500 which is roughly (40%-55% critical rate from stat alone) this combine with crit from red dust and chainsword will allow you to fully utilize keen blunt weapon. You also want 800 in swiftness for you to fully utilize raid captain engraving and to make you dps rotation much more smooth.

Advanced Mayhem Berserkers Guide

This video is an advanced guide if you are interested

Skills

Runes

Tripods

Skill Rotations

Card sets

Relic armor set

Stats

Advanced Mayhem Berserkers Guide