Overview:

Adaptation of LaserLlama's Alternate Monk homebrew into BG3

Attempts to balance between the homebrew and vanilla monk implementation as best as possible alongside what was actually feasible to implement. I recommend reading the original homebrew to see a more comprehensive explanation of the class mechanics. There is a section further below explaining the deviations from the source material in this mod.

Currently Adds 7 Subclasses, Changes the 3 Vanilla Subclasses and adds 28 Techniques.

Also adds Unarmed Attack (can be used whilst melee weapon is equipped) and Decoupled Flurry of Blows to all subclasses.

Techniques
Adds 28 Total Techniques, which work similarly to Battlemaster Maneuvers to enhance the monk's versatility and choices in and out of combat. They can be chosen at certain levels and you have a limited total amount (a table is available in the pictures, or written below in the Base Class synopsis). A brief synopsis for each technique is below:

Level 3+:

• Arresting Strike (Dexterity Save - Target Speed becomes 0)
• Disabling Strikes (Constitution Save - Target is Blinded or Silenced)
• Empowered Strike (Strength Save - Knocked Prone & Pushed back 5m. Large+ Creatures have advantage on the save, Smaller- Creatures have Disadvantage)
• Mystic Healing (Heal yourself or an ally - similar to Cure Wounds)
• Patient Defense - From Vanilla
• Slow Fall* - From Vanilla
• Step of the Wind - From Vanilla (Both Dash & Disengage) - With no Ki Cost
• Whirling Strike (Attack roll - All creatures in reach take Unarmed Strike damage)
• Spiritual Armour (Gain Temporary HP equal to your Wisdom Modifier, the first time the temporary HP is damaged you can cause 1 roll of Martial Arts Force damage against the attacker using your reaction)
• Improvised Throw (Use Martial Arts die for improvised weapon throw attacks - 1 roll for light and 2 for medium-heavy objects)

Level 5+:

• Deflect Missiles* - From Vanilla
• Gentling Touch (No Save - Target falls asleep)
• Seeking Strike (Reroll Attack if you missed - Similar to Reckless Attack)
• Slowing Strike (Charisma Save - Target is Slowed)
• Stunning Strike - From Vanilla
• Adept Fighting Style (Choose out of 8 Fighting Styles to apply to your character)
• Crushing Strike (Increase unarmed strikes damage by 1 roll of Martial Arts die per Ki Point spent up to your wisdom modifier)
• Divine Light (Pick two cantrips from the Cleric spell list)

Level 9+:

• Aura Sight* (Blindsight 20ft & See Invisibility)
• Heavenly Step* (Difficult Terrain doesn't affect you and you can jump further)
• Indomitable Spirit* (Bonus to Acrobatics checks equal to your Wisdom Modifier)
• Mantle of Courtesy* (Persuasion Proficiency, Bonus to Persuasion checks equal to your Wisdom Modifier)
• Monastic Fortitude (Reduce incoming damage by 2 Martial Arts die rolls for 2 Ki Points)

Level 11+:

• Tranquility* - From Vanilla
• Mystical Integrity* (You cannot be moved against your will and Advantage against being Restrained)
• Tongue of Sun and Moon* (Cast Speak with Animals and Speak with Dead at will)
• Banishing Strike (3 Ki, Charisma Save for damage of 3 Martial Arts die rolls, Half damage on save. If damage brings target under 50hp they are banished until the end of your next turn)
• Conjure Previous Life (5 Ki, Cast Divine Guardian)

The DC for these techniques is 8 + Proficiency Bonus + Wisdom Modifier. You can replace a learned technique with a different one each time you level up (With the exception of Wu Jen Monks).

As of v5.0.0 passive techniques (marked with *) are automatically given. When you level up a 2-minute timer is started, then the passive techniques chosen are assigned to you. If this fails for any reason you can add them by initiating a pickpocket with anyone (such as Withers).

Base Class
The Martial Arts die now start at 1d6 and end at 1d10 at Level 12.
Ki Points scale according to Monk Level + Wisdom Modifier

• Level 2: Ki Points (Monk Level + Wisdom Modifier), Flurry of Blows
• Level 3: Subclass, 3x Techniques
• Level 4: Ability Score Improvement
• Level 5: Extra Attack, 1x Technique
• Level 6: Enlightened Fist, Subclass Feature
• Level 7: Evasion, x 1 Technique
• Level 8: Ability Score Improvement
• Level 9: Spirit of Tranquility (Reaction: Add Wisdom Modifier to Saving Throw for 1 Ki Point), 1x Technique
• Level 10: Subclass Feature
• Level 11: Ki Adept (Use Technique that costs 1 Ki once per combat for free), 1x Technique
• Level 12: Ability Score Improvement

Vanilla Subclasses
Way of the Open Hand - (Way of the Open Hand)
While all Monks are warriors, the disciples of the Open Hand train relentlessly, honing their body itself into a weapon. They don't neglect their spiritual training but pride themselves on their skill with martial arts, and it is exceedingly rare to see an Open Hand Monk using a weapon other than their fists.

• Level 3: Empowered Strike Technique, Practiced Strikes (Use Technique that costs 1 Ki once per turn for free up to Wisdom Modifier per long rest)
• Level 5: Stunning Strike Technique
• Level 6: Ebb & Flow (When an enemy misses you can either make an unarmed attack or knock it prone and set its speed to 0 until the end of its turn)
• Level 9: Indomitable Spirit
• Level 10: Ki Resonation

Way of the Shadow Arts - (Way of the Shadow)
While most traditional martial artists value honorable tactics and combat styles, disciples of the Shadow Arts exploit every weakness, no matter how dishonorable. Assassins, spies, and infiltrators, Shadow Monks twist darkness to their advantage and will only strike when their success is absolutely assured.

• Level 3: Slow Fall Technique, Eyes of Night (Darkvision/Superior, Advantage on Stealth checks in darkness/dim light), Shadow Arts (Darkness, Darkvision, Pass Without Trace, Silence)
• Level 5: Gentling Touch Technique
• Level 6: Shadow Step, Cloak of Shadows
• Level 9: Heavenly Step Technique

• Level 10: Shadow Strike

Way of the Wu Jen - (Way of the Four Elements)
Rather than focus inward, some Monks attune themselves to the forces of nature. Known as Wu Jens, these primal sages augment their skills with the power of the five elements; Air, Earth, Fire, Water, and Wood. Through meditation, they can learn to channel their Ki into displays of elemental power.

• Level 3: 2x Cantrips, 2x Wu Jen Spell, 1x Wu Jen Spell Slot
• Level 4: 1x Wu Jen Spell Slot
• Level 5: 1x Wu Jen Spell
• Level 6: Fist of the Five Ways (Elemental Unarmed Attack with extra reach)
• Level 7: Existing Wu Jen Slots become Level 2,  1x Wu Jen Spell
• Level 9: 1x Wu Jen Spell
• Level 10: 1x Cantrip, Spiritual Flow (Can use 2 Ki to cast Action spell as a Bonus Action)
• Level 11: Existing Wu Jen Slots become Level 3

Spell save DC = 8 + your proficiency bonus + your Wisdom modifier
Spell attack modifier = your proficiency bonus + your Wisdom modifier
Wu Jen Spell Slots function identically to Warlock Spell Slots. (a table is provided in the images on amount of Wu Jen slots & Levels)

New Subclasses
Way of the Wuxia - (Way of the Kensei)
While all Monks are able to wield the weapons of their style to great effect, those who follow the Way of Wuxia dedicate their lives to complete mastery over a chosen few weapons. These warriors are known for their extreme focus and are always seeking progressively stronger warriors to challenge and test their skill with their chosen weapons of war.

• Level 3: Patient Defense Technique, Choose 1 Melee and 1 Ranged Wuxia Weapon, Gain 2 Features that can be used with the Wuxia Weapons.
• Level 5: Seeking Strike Technique
• Level 6: Ki Infused Weapons (Wuxia Weapons become magical, Can do additional damage with a ki point and Flurry of Blows can do 2 Wuxia Weapon attacks)
• Level 9: Heavenly Step Technique
• Level 10: Spirit Blade (Empower attacks with 1-3 ki points to lower the Critical Hit threshold by 1-3)

You gain additional Wuxia Weapons at 6th & 11th Levels

Way of the Rising Dragon - (Way of the Ascendant Dragon)
Often found in the service of ancient dragons, disciples of the Rising Dragon learn to use their Ki to mimic the power of dragons. These draconic warriors vary greatly based on the dragons they emulate, but despite differences, they all carry themselves with the regal bearing of a great dragon.

• Level 3: Step of the Wind Techniques, Choose Draconic Element (For Unarmed Attacks, Flurry of Blows and Elemental Breath) & Draconic Spirit (Persuasion/Intimidation buff), Gain Draconic Elemental Breath (Higher Levels unlocked based on Wisdom Modifier)
• Level 5: Deflect Missiles Technique
• Level 6: Ascendant Step (Can fly when you use Step of the Wind)
• Level 9: Indomitable Spirit Technique
• Level 10: Draconic Mantle (You and nearby allies gain resistance to your draconic element and have advantage on saving throws against charmed or frightened, you gain an Elemental Breath damage bonus equal to your Wisdom Modifier)

Way of the Astral Warrior - (Way of the Astral Self) 
Focusing almost completely on the development of the spirit, disciples of this Tradition learn to manifest their inner selves into the world through Ki. With great dedication and practice these esoteric warriors learn to manifest their Astral Self, a luminescent projection of their Ki that covers them in armor

• Level 3: Mystic Healing Technique, Gain Astral Self Ability (Deal damage in an area around you on activation, Replace Strength/Dexterity attack and damage rolls with Wisdom, further reach for unarmed strikes, use Wisdom in place of Strength for Saving throws and Skill Checks)
• Level 5: Deflect Missiles Technique
• Level 6: Astral Visage (Gain Thaumaturgy cantrip, bonus to Insight checks equal to 1 roll of Martial Arts die, When astral self is active you gain blindsight for mundane and magical darkness)
• Level 9: Mantle of Courtesy Technique
• Level 10: Mystical Defense (Can extend the use of your deflect missiles to fire, acid, cold, force, thunder or lightning damage. Once per turn when your astral self is active you can deal an additional roll of your martial arts die of force damage)

Way of Radiance - (Way of the Sun Soul) 
Legends tell of wandering sages that channel bursts of light from within their bodies. These students of Radiance have such fine control over their spirit that they can assault others with luminous blasts of Ki. These wondrous warriors travel the land promoting harmony and justice among all peoples.

• Level 3: Empowered Strike Technique, Radiant Bolt (Ranged attack that can replace your unarmed strike), Light Cantrip
• Level 5: Stunning Strike Technique
• Level 6: Searing Blast (AOE cone of Radiant blast, Dex saving throw)
• Level 9: Indomitable Spirit Technique
• Level 10: Luminous Burst (Long line blast of Radiant energy, Dex saving throw, can be upcast up to Wisdom Modifier and used Wisdom modifiers per long rest, can be cast with no charges left by using 3 Ki points)

Way of the Reaper - (Way of the Long Death) 
While most monastic orders teach their students to live their lives to their full potential, those who practice the Way of the Reaper are obsessed with the ending of lives. Reaper Monks learn to channel deathly Ki to fuel their own martial prowess and are experts at using fear and other sinister techniques to drain the life force from others in order to prolong their own.

• Level 3: Disabling Strikes Technique, Frightful Touch (Wisdom Save, Target becomes Frightened), Necrotic Spirit (Unarmed can deal Necrotic, Resistant to Necrotic Damage, Advantage against being frightened)
• Level 5: Slowing Strike Technique
• Level 6: Sinister Vitality (Gain Temporary Hit points, whilst active you are resistant to Bludgeoning, Piercing and Slashing)
• Level 9: Aura Sight Technique
• Level 10: Armour of the Grave (When you drop to 0 hit points, spend 1 ki to regain 1, each subsequent time costs 1 additional Ki)

Way of the Drunken Fist - (Way of the Drunken Warrior) 
Where most Monks are serious and contemplative, students of the Drunken Fist seek out joy wherever they go. Masters of a style that mimics the unpredictable movements of a drunk, these Monks will use their considerable skills to play the fool and make others laugh or to embarrass haughty nobles.

• Level 3: Step of the Wind Techniques, Jovial Performer (Proficiency in Performance & Deception, Gain Throw/Improvised weapon attack that uses Martial Arts die for damage), Drunken Style (Each melee hit grants 5ft/1.5m of movement, Each melee hit gives the target disadvantage on opportunity attacks until the start of your next turn)
• Level 5: Deflect Missiles Technique
• Level 6: Unpredictable Sway (When you are prone you can get up with only 5ft/1.5m of movement, When a creature misses you you can spend 1 ki to redirect the attack to an enemy within melee range)
• Level 9: Heavenly Step Technique
• Level 10: Chaotic Luck (Toggleable passive that gives advantage on any ability check for 1 ki, Reaction that lets you reroll a failed attack roll or saving throw for 1 ki)

Way of Yin and Yang - (Way of Mercy) 
Balance in all things. This is the mantra of Monks that devote their lives to the Way of Yin & Yang. Known for their mystical abilities to manipulate Ki to heal wounds, cure disease, and even disrupt powerful curses, these Monks keep all things in balance. However, when creatures look to extend their lives through unnatural means or cheat death, these warriors will use their powers to destroy said creatures, restoring balance.

• Level 3: Mystic Healing Technique, Monastic Healer (Proficiency with Insight and Medicine, Bonus to these checks equal to your Martial Arts die), Touch of Life (replace an unarmed strike with a healing effect equal to your Martial Arts die + WIS mod), Touch of Death (add necrotic damage to an unarmed strike equal to your Martial Arts die)
• Level 5: Gentling Touch Technique
• Level 6: Precise Manipulation (When you use Touch of Life you end: Blinded, Paralyzed, Poisoned, Stunned on the target. When you use Touch of Death you cause the target to be poisoned)
• Level 9: Mantle of Courtesy Technique
• Level 10: Mystical Touch (Can scale Touch of Life and Touch of Death up to your WIS modifier to empower them)

Installation:

Compatibility:

Incompatible with ANY monk mods changing Monk class progressions. Subclasses can likely be merged to run however some core monk abilities (Such as Ki Adept) may not function correctly as they are hardcoded to specific spells/abilities. This mod also overrides some vanilla monk features & attacks.

UnlockLevelCurve 13-20 is compatible, however, it overrides the Martial Arts die formula from this mod, so load this mod after UnlockLevelCurve

Changes the following items:
Drakethroat Glaive to allow Rising Dragon breath weapons
Corellons Grace to work with Radiance's Radiant Bolts

Patches Available for:
5e Spells
Hiding Dragon Scales for Rising Dragon
Draconic Bloodline Dialogue options for Rising Dragon
Level 2 Feat

Deviations from the Homebrew:
Base Class:

• First Techniques gained at Level 3 instead of Level 2 to avoid users picking a technique they later receive from their subclass at Level 3.
• Ki Adept is Once Per Combat instead of Once per Turn

Way of Open Hand:

• Both Level 10 features (Open Hand Strike & Master of Many Forms) have been replaced by Ki Resonation from the vanilla subclass

Way of Shadow:

• Cloak of Shadows moved to Level 5 as per Vanilla subclass with the vanilla implementation
• Shadow Strike added at Level 10 to replace Cloak of Shadows, the same level as the Vanilla subclass

Way of Wu Jen:

• All Wu Jen spells allow a bonus action unarmed strike without a level requirement
• Cannot change techniques each level (Game Limitation)
• All of the Four Elements spells are included in the spell lists
• Wu Jens gain third level slots at Levels 11 and 12 instead of 13 and 14

Way of Astral Warrior:

• Astral Visage doesn't give a roll bonus to Intimidation as Thaumaturgy grants Advantage instead
• Mystical Defense deals force damage regardless of the incoming damage
• Mystical Defense now uses Wisdom Modifier instead of Dexterity Modifier
• Astral Self activation damage won't affect allies within the range

Way of Rising Dragon:

• Line/Cone is determined by your dragon instead of a choice

Way of Drunken Fist:

• Jovial Performer: Gives Deception Proficiency instead of Proficiency in Brewers Supplies & Improvised Weapons
• Drunken Style: Don't need to hit unique creature for the movement bonus. Opportunity attack debuff is not only for AoO against you.
• Unpredictable Sway: Standing up takes 5ft/1.5m instead as otherwise would require overwriting vanilla features for other classes
• Chaotic Luck: Split up and changed to advantage for ability checks and rerolling for attack/saving throw as cancelling out disadvantage is not possible.

Way of Yin & Yang:

• Touch of Life: With Ki Adept, it gets its normal usage. (no Temp HP limitation)
• Precise Manipulation: All the listed effects are removed and Poisoned is always applied

Techniques:

• Heavenly Step effects changed to Advanced Unarmoured Movement
• Crippling Strikes renamed to Disabling Strikes
• Indomitable Spirit changed to work similarly to Mantle of Courtesy, giving a flat bonus to Acrobatics checks equal to your Wisdom Modifier
• Gentling Touch formula changed to (3+KiCost)*WisdomModifier + Monk Level (for compatibility with Larian)
• Whirling strike changed to an attack roll
• Mystic Healing can now also be used to heal an ally
• Slow Fall uses the vanilla Slow Fall
• Armor of the Ascetic moved from Level 13 to Level 11 and renamed to the vanilla monk feature Tranquility
• Mystical Integrity & Tongue of Sun and Moon moved from Level 13 to Level 11

Known Bugs / Shortfalls:

• The DC shown at the spell/technique selection/character level up screen is wrong as it uses the vanilla DC calculation
• Disabling Strikes container spells sometimes collapse into subcontainers
• Tavern brawler causes the extra damage done to be bludgeoning (Unavoidable - hardcoded by Larian)

Future Plans:

• Possibly add techniques & Subclasses from Alternate Monk:Expanded

Acknowledgements:

• LaughingLeader, Norbyte, Lykon & ShinyHobo - For creating Modding Tools
• Larian Discord server modding community - For any questions
• Kaz for Collaboration with the Monastic tag - Check out their Githzerai race mod!