Way of the street punk

The combination of both light and dark, malice and purity by taking this path you learn to use your rage as your enlightened mindset by gaining power through knowledge of past fights losses and wins to fuel your overwhelming victory 

Dirty martial arts

Starting at 3rd lvl, Due to your sheer power and will you gain martial arts die faster instead of you gain them 2 lvls earlier at 3,9,15, you also gain more flurry of blows in place of the level 11 and level 17 damage dice, your hit dice also becomes 1d10 instead of 1d8 due to you being more muscular and endurable.

Due to being a dirty fighter whenever you make an opportunity attack you get one extra flurry of blows

repercussive burst

beginning at level 6, whenever you hit someone with your flurry of blows you marks them until the end of the fight, whenever they hit you or end up missing you with a weapon attack after you mark them you can hit them back with a unarmed strike as a reaction.

Knowledge enhanced Brachium blitz barrage

Starting at 11th level, you become so attuned with fighting that you have learned to combine rage with enlightenment you learn to spot open points in your enemies armor or body, to strike them in those really specific places.

This innate ability allows you to get adv to hit on all flurry of blows attacks, does not work if blinded, grappled, or restrained 

Enthralled requiem

Starting at level 17,  you learn to give up all means of defense morality and compassion.

Once per short rest you can enter a state of frenzy for 1 minute whenever you go below half health, you become resistant to the attack that got you below half, you also become so focused on killing and winning, your muscles go into overdrive causing you to take Dmg at the end but you gain extra move speed equal to 4x your dex rounded to the nearest 5, your unarmed strikes become 1d12 during this time but after the 1 minute you take Dmg equal to the amount of attacks and ft moved divided by 3 rounded up.

also If you drop to 0 hit points while you’re like this you don’t die outright, you can make a DC 10 Constitution saving throw. If you succeed, you drop to 1 hit point instead.

Each time you use this feature after the first, the DC increases by 5.