Way of the Pirate Queen of Pinghai Bai

Trained by the Thunderer, educated by Yu-Ti, defeated Shou-Lao became the city's champion, the Immortal Iron Fist

While theteachings of K'un-Lun are vast and worth their own build, this particular style is so unique that also deserves to be considered, for both the evolution of martial arts its important, specially when something as ancient, nay primordial, as chi meets the latest advancements of man.

Adapting the techniques of Wu Ao-Shi, Pirate Queen of Pinghai Bai--herself an Iron Fist--to modern times, Orson Randall wields twin handguns from which he fires "lightning from god"

Giving as a result a mix of martial arts, chi channeling and gun-fu

Extract Aspects

Starting at 3rd level, you can strike pressure points to intuit crucial information about a foe. When you hit a creature with one of the attacks granted by your Flurry of Blows, you can analyze it. Whenever an analyzed creature misses you with an attack, you can immediately use your reaction to make an unarmed strike against that creature if it’s within your reach. This benefit lasts until you finish a short or long rest.

Additionally, when you analyze a creature, you learn all of its damage vulnerabilities, damage resistances, damage immunities, and condition immunities.

(WW)One with the Gun

At 3rd level, you extend your ki into your Gun Fu weapons, giving you the following benefits.

Magic Gun Fu Weapons. Your attacks with your Gun Fu weapons count as magical for the purpose of overcoming resistance and immunity to nonmagical attacks and damage.

Explosive Retaliation. When a hostile creature makes a melee attack against you, you can spend 1 ki point to use your reaction to make an attack against them with your gun fu weapon.

Quickdraw

When Initiative is rolled you can use your reaction to make a single attack with a firearm. You are considered to have Advantage on that attack. You can pull out that firearm as part of the attack.

Ki-Fueled Marksman

At 3rd level, you are trained to incorporate your use of firearms into close quarters combat, giving you the following benefits:

• Marksman. You are proficient in firearms. Any firearm that lacks the two-handed property counts as a monk weapon for you. Additionally, attacking while within 5 feet of a hostile creature does not impose disadvantage on your attack if you are using a firearm as a monk weapon for that attack.
• Fast Reloads. When one of your firearms is out of bullets, you can use your reaction to reload that weapon. You do not need a free hand to do so.
• Flurry of Shots. When using your Flurry of Blows Feature, you can replace one of the attacks with an attack from one of your firearms that counts as a monk weapon for you.

Mind of Mercury

Starting at 11th level, you’ve honed your awareness and reflexes through mental aptitude and pattern recognition. Once per turn, if you’ve already taken your reaction, you may spend 1 ki point to take an additional reaction. You can use only one reaction per triggering effect.

Rapid Fire

Starting at 11th level, when you use your martial arts or flurry of blows features, you can make the attacks with a ranged weapon you are holding instead of unarmed strikes. In addition you can spend 4 ki points as an action to make a ranged attack roll against a number of creatures equal to your dexterity modifier that are within your weapons range, you ignore the loading property for these attacks but still spend ammunition, and must make an attack roll against each target.

Debilitating Barrage

Upon reaching 17th level, you’ve gained the knowledge to manipulate a creature’s ki to undermine their fortitude. When you hit a creature with an unarmed strike, you can spend 3 ki points to cause the creature to gain vulnerability to one damage type of your choice for 1 minute, or until the end of a turn in which it has taken damage of that type.

If a creature has resistance to the damage type you choose, this resistance is suppressed for 1 minute, rather than gaining vulnerability. A creature that is immune to the damage type you choose is unaffected. A creature who is affected by this feature cannot be affected by it again for 24 hours.