These monks train in monasteries , which are always near water , because water is the main trainig tool , where students can perfect the flow , and flow manipulation. Usually coastal , and in water buildings , but big lakes , or bigger body of waters can work as well. The lessons use water and its moovments , but the practical use can the manipulation of attacking weapons , redirecting magic , and using momentum to strengthen the attacks. 

Mooving strike

Shoveing nekifutással: the target needs to make a contested strength check , on a fail he gets pushed back , by half of the distance that u ran in a single line toward the target and falls prone, if the target succeds the check it gets knocked back by 5 feet and doesnot go prone. If after the push the creature hits a wall he suffers the effect of a stunning strike(same dc) prone or not prone.

Falling strike: before a fall u can prepare a falling strike as an action , this makes it that , in the fall u can deal a martial arts die bonus damage per every 10 feet that u fell (maximum damage is at 100 feet)

Running strike: After running min 20 feet in a line toward a target , your first attack deal donus martial die damage 1 for the first 20 feet , then 1 for every 10 more (ran in a single line toward the target) (the maximum damage is at 50 feet)

Underwater harmony

Studying waves and the water itself made a a fearsome underwater combatant , the knowledge makes monk to not have disadvantage on weapon attacks , while the the monk gains swimming speed equal to its walk speed by using step of the wind and can use all of its mooves underwater as well.

Flow like the water

The zen and peace of the patient defense makes the monk swift and efficent , with just a small tip of the weapon , they can maipulate the flowing energy around them. This state looks like they just become the boss.

Manipulate attack

If the monk is missed by an attack , than he can use it's reaction to redirrect the swing to the attacker.  U have to roll an attack with advantage , if the attack hits dmg depends on the fist attack. 

Magical flow 1

If u are hit with a ranged spell attack ,  can use your reatcion to lower the damage of it by 1d10 +dexterity modifier + monk level. If u reduce the damage to zero , then u can spend 1 ki point to make your next unarmed strike deal bonus 1martial arts die damage of the spells type.