A master of hand to hand martial arts that understands how to quickly and efficiently pummel onto a creature without leaving them open to that target being able to fight back. Such a master is advised to be taken from long range and in the situation you must go up close you must take them out before they start up their rapid flow strikes.

Pressuring

At 3rd level the user of rapid fists has learnt to use a constant stream of attacks pushing a creature back and keeping them from acting out harm against the user however leaving the creature open at the same time. When you hit two or more times in a turn against a creature you can use up a ki point and force the creature to make a Strength Saving Throw and on a fail the creature is labelled as pressured which grants the creature the restrained condition however only halves their movement speed. If the creature attempts to move away from the user the user can take an attack of opportunity even if the creature normally would not be targetable and does not cost a reaction. However once it comes to your turn you must use your action to keep the effect up the action being considered an unarmed strike or it drops and the user can only make attacks against the creature they targeted to be Pressured otherwise they drop it.

Rapid Strikes

At 6th level the user of the rapid fists has learned to turn utilise their rapid attacks without the need of focusing on applying pressure allowing them to use a ki point to make one additional attack when they successfully hit with a non ki point unarmed strike. This special attack can only be used once per attack.

Studied Strikes

At 11th level you have learned to study an opponent with each strike giving you a +1 bonus to all to hits and damage and ac against that creatures attacks up to your wisdom modifier(Maximum One) for every successful attack you make against them however this is reset when you stop attacking them, make an attack against a different creature or are incapacitated.

Gather One's Wits

At 17th level you have learnt to calm and gather your spirits more naturally making it so whenever you successfully hit a creature with an unarmed strike or spend an action to do so you can regain one ki point. Additionally whenever you use the  Stillness of Mind as an Action you can regain one ki point and you can use the Stillness of Mind feature as a Reaction or Bonus Action instead of an action however you do not gain ki points from doing so.