Path of focus

a mindflayer lets out and astral blast of energy, leaving most of the adventuring party down or on deaths door, besides the barbarian who quickly shakes it off before dashing forward greatsword in hand, they slide under the mindflayer before jumping back up and slicing the beasts head clean off in one swipe. 

Quiet Rage

a path of focus barbarian will be able to attempt to keep concentration, this may be more helpfull to someone who multiclasses as a spellcaster however any barbarian may be able to make use of this.

barbaric sharpness

while in a rage the Focus barbarian will usually stay quiet and speak little, so when speaking to another humanoid they may be not as charismatic as usual, this does not apply to charisma saves, or intimidation rolls.

calmness of the mind and body

as the barbarians mind improves so does its control over its physical body.

meditation of injustice

the focus barbarian finds its rage through various means, however whatever fuels them it will be remembered in slumber or rest.

spare wisdom

the barbarian will use up the rest of their focus in an attempt to succed the save, leaving them dazed but still able to fight.