Monk Homebrew Item, feedback appriciated

Hi everyone, I made a homebrew Item that is specfically intended to be given to a monk as part of their background-specific personal Quest.
The concept is based on Items such as dragon horde weapons, or the vestiges of divergence (meaning, the item is given in a relatively low powered state, and then unlocks more of its potential as the story progresses and the wielder's character grows).

I would love some feedback on what you guys think in terms of creativity, balance, and what improvements I could or should make before handing it out to a player.
Anyway, here it is:  Robe.


Robe of Arkathen

Wondrous Item, Clothes, Legendary
Requires Attunement by a Monk

This robe was owned by the legendary Monk Zeref Arkathen, whose martial prowess
was said to exceed the boundaries of the mortal plane.

Dormant state (Level 1)

Harmony:
Your maximum Focus Points are increased by your proficiency bonus.

Equilibrium:
When the wearer is using Deflect Attacks/Energy, they can add their wisdom
modifier to the calculation for damage reduction. If the damage is reduced to zero and
the wearer decides to spent one focus point to redirect damage from the attack, they
can also add their wisdom modifier to the amount of of damage returned.

Discipline and Focus:
Whenever the wearer is rolling one or more Martial Arts Dice, they can replace any
number of those rolls which are below the wearer’s Wisdom modifier by that number.
(for example, a 2 on the Martial Arts Die can be changed into a 5 if the wearer's
current Wisdom Modifier is +5).

Awakened State (Level 2)

[previous Bonuses]

Perfect Defence:
Whenever the wearer is hit by an attack roll, they can use patient defence as a
reaction (still costs 1 Focus Point). If the damage happens while trying to reduce
damage with the Deflect Attack/Energy feature, using patient defence can be part of
the same reaction (again, still costs 1 Focus Point)
Explosive Martial Arts: Whenever the wearer rolls one or more martial arts dice and
rolls the maximum number the die can roll (so an X on a DX), they can roll another
die of the same type and add the result to the roll. If multiple dice are rolled, add one
die for each maxed-out roll. This feature can be used again if any of the additional
rolls also roll the highest possible number, and so on. The total number of dice added
to one damage roll cannot exceed their wisdom modifier.

Explosive Martial Arts:
Whenever the wearer rolls one or more martial arts dice and
rolls the maximum number the die can roll (so an X on a DX), they can roll another
die of the same type and add the result to the roll. If multiple dice are rolled, add one
die for each maxed-out roll. This feature can be used again if any of the additional
rolls also roll the highest possible number, and so on. The total number of dice added
to one damage roll cannot exceed their wisdom modifier.

Exalted State (Level 3)

[previous Bonuses]

Hands of War and Peace:
Whenever the wearer is spending at least one Focus Point as part of any action, bonus
action or reaction which doesn’t including the wearer making an attack, they get to
make one unarmed strike as part of that same Action/BA/Reaction.
This feature only triggers once per Action/BA/Reaction
[So this wont work on FoB, Stunning Strike, or subclass features that already attack during that
Action/BA/Reaction]

Reservoir of Spirit:
The Focus and Discipline the wearer utilizes in their martial arts creates a pool of
spiritual energy within themself.
Whenever the wearer expends one or more Focus Points, the robe gains a reservoir charge.
These charges, if not expended, last for 10 minutes or until the wearer takes a long or
short rest, or attunement ends. The robe can gain a maximum of one reservoir charge per turn.
Once per turn, when rolling at least one martial arts die, the wearer can expend a
number of these charges (up to their wisdom modifier) to add that number of
additional martial arts dice to that roll.