Path of consciousness

The barbarian now knows about a litte bit of strategy, because of that he starts to block and parry even with a shield and now he knows when is a good time to strike. Obviosly he still a barbarian but with a little bit of self control. This subclass is foucussed on give the barbarian a solid defense and make him stop to be just a flesh shild.

Know when to strike.

With a shield off hand he can look to the enemy cautiously and learn his movements. If a barbarian uses a bonus action with the shield in hand, he analyzes the target and gains 1d4 on the hit roll.

Bow proficiency

With a little bit of training the barbarian learn how to use bows, but bows don't have rage upgrades.

Armor proficiencies.

In this path slowly the brute starts to be smarter and to protect himself more.

Protective rage

As you grow you learn how to control your rage and make it a defense. Now rage stops if you take no damage and doubles your AC you gain +1d10 attack damage.

More defence

After a lot o training the barbarian start to use all he learned to make himself the armor be one. Your AC becomes 10 + your Dexterity modifier + your Constitution modifier + your armor AC, but your damage decreases by a third (rouded up)