Base Class: Monk
You have mastered the art of using anything you can pick up as a weapon. Silk sashes, ropes, chairs, ladders, carts, pool equipment, pool cues, pool balls, dodgeballs, wrenches... in the hands of a Chan master anything can be a weapon, and they can all be used with the fluid and grace of any monk weapon.
Path of the Chan
When you choose this tradition at 3rd level, your special martial arts training leads you to master the use of improvised weapons. This path also includes instruction in the fluid movements of dance. You gain the following benefits.
Improvised Weapon Specialist. You gain proficiency with improvised weapons if you don’t already have it. Improvised weapons are monk weapons for you. Many of this tradition’s features work only with improvised weapons.
Improvised Parry. If you make an unarmed strike as part of the Attack action on your turn and are holding an improvised weapon, you can use it to defend yourself. You gain a +2 bonus to AC until the start of your next turn, while the weapon is in your hand and you aren’t incapacitated.
Improvised Shot. You can use your martial arts die for rather than their normal damage die for improvised weapons you throw. Immediately after you take the attack action on each of your turns you can spend 1 Ki to make two ranged weapon attacks as a bonus action by throwing improvised weapons.
Way of the Chan. You gain proficiency in the (Performance) skill if you don’t t already have it.
One with anything I can get my hands on!
At 6th level, you extend your ki into your improvised weapons, granting you the following benefits.
Magic Improvised Weapons. Your attacks with improvised weapons count as magical for the purpose of overcoming resistance and immunity to nonmagical attacks and damage.
Improvised Strike. When you hit a target with an improvised weapon or unarmed strike, you can spend 1 ki point to cause the weapon to deal extra damage to the target equal to your Martial Arts die. You can use this feature only once on each of your turns.
Pick it up Quick. You gain one additional free item interaction on each of your turns.
Improv Training
At 11th level, you gain the ability to augment your weapons further with your ki. As a bonus action, you can expend up to 3 ki points to grant one improvised weapon you touch a bonus to attack and damage rolls when you attack with it. The bonus equals the number of ki points you spent. This bonus lasts for 1 minute or until you use this feature again. This feature has no effect on a magic weapon that already has a bonus to attack and damage rolls.
Chan Style Grapple. When you hit a creature with an unarmed strike or an improvised weapon on your turn, you can use a bonus action to attempt to grapple the target.
Blind Luck
At 17th level, your mastery of weapons grants you extraordinary accuracy. If you miss with an attack roll using an improvised weapon or unarmed strike on your turn, you can reroll it. You can use this feature only once on each of your turns.
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There are only a couple tweaks from Kensei but I actually really like it, sounds like a fun subclass to play