Knockout Artist

This is not your ordinary monk. Members who follow this philosophy do not call it a way and do not think of it as such. These monks focus on power and striking ability over ki and serenity. Not to say that they lack wisdom, it is just how monks train their minds and bodies, these monks focus more on the body. In an even fight most monks would win, but knockout artists don't pick even fights. They fight dirty and use every advantage they can. Many criticize these monks for lacking discipline and restraint, but adhering to strict moral codes is what holds most other monks back. 

Walloping

You are well versed in taking advantage of an opponents distraction. Once per turn you can deal an extra 1d6 damage to one creature you attack with an unarmed strike if you have advantage on the attack roll. You must not be holding a weapon at the time of the attack. You do not need advantage on the attack roll if the target creature is within 5 feet of another enemy, that enemy isn't incapacitated, and you don't have disadvantage on the attack roll.

This damage increases by 1d6 every three levels after 3 to a maximum of 6d6 at level 18. Every level you gain a new die of damage you do not gain a point of ki. This damage stacks with sneak attack or similar features from other sources. For the purposes of determining eligibility for features and feats, your unarmed strikes count as finesse weapons.

Unchained

At 6th level, you gain the ability to use your frustration to push through the things that hold you down. If anything would cause you to have disadvantage on an attack roll for an unarmed strike, as a bonus action, you can forgo your multiattack in exchange for a single attack without disadvantage.

Make 'em See Stars

Beginning at 11th level, when you score a critical hit against an opponent with an unarmed strike, roll an extra unarmed damage die for determining the damage.

Knockout!

At 17th level, when you reduce a creature to zero hitpoints with an unarmed strike, you may immediately make a second unarmed strike with advantage against a different creature. This strike does not count towards your multiattack, bonus action unarmed strike, or flurry of blows. If the attack hits, you may add your walloping dice to your attack again if you have already done so or you can add your walloping dice to another unarmed strike if you haven't done so already.