Increased Speed: An optional skill that is really helpful for traveling across the map.
Increased Stamina: It’s a prerequisite for the Increased Speed skill.
Additional points affect only the duration of the skill, so invest just a point here.
Battle Command: It increases your entire party’s skill levels by 1 point.
You shouldn’t invest more than 2 points here due to diminishing returns.
Natural Resistance: It increases your resistances passively.
Iron Skin: It’s a Passive skill that boosts your defense.
Optional skills that you can consider for placing your remaining points:
Stun: It serves as a prerequisite for Concentrate and as a crowd control skill as it stuns enemies.
Shout: It boosts your entire party’s defense and also a prerequisite for Battle Orders.
Howl: It’s a prerequisite for Battle Orders and a helpful Crowd Control too as well.
Some players choose to invest a lot of points in Berserk because it provides magic damage to Concentrate passively, so you don’t have to switch skills for killing physical immune enemies. However, your defense drops to 0 for a short duration. It’s useful in PvP against Necromancers’ Iron Maiden too. It also helps you fight monsters with physical immunity, converting your damage to magical.
Berserk: It’s a synergy skill for Concentrate.
Other skills and prerequisites that you should invest at least 1 point are:
Weapon Mastery: Although the defense is the main trait of the build, Masteries provide critical strike chance, attack, and damage.
Bash: It knockback the enemies and also provide synergy to Concentrate.
Battle Orders: Max out this buff for its synergy and the ability to boost yours and your party life and mana.
It attacks an enemy and raises your defense at the same time.
Concentrate: This skill indicates the name of the build.
These skills should have a 20 point investment: Your primary skills that you should max out (20 points) are: However, the Berserk skill can change the tide.
It’s weak versus large groups of monsters with physical immunity.
The build doesn’t have a large damage output.
A safe choice for Hardcore mode, thanks to his sustainability.
His Warcries serve as great buffs for him and his allies.
The high defense allows the Conc Barb to act as a very durable tank in every kind of party.
In contrast with the majority of the Barbarian builds, the Conc Barb focus mainly on his defensive skills rather than dealing massive amounts of damage.