Black belt is 75 with these Stats

DEF: 7 STR+7 Haste +12%
Subtle Blow +5
Physical Damage taken -5%

Apparently The black belt (to some people) is dead with new Expansion.

My Suggestion is to upgrade it a little.

Black Belt 1st dan (level 80)

DEF: 8 STR+8 Haste +12%
Subtle Blow +7
Physical Damage taken -5%

Black Belt 2nd dan (level 85)

DEF: 9 STR+9 DEX+5 Haste +12%
Subtle Blow +7
Physical Damage taken -5%

Black Belt 3rd dan (level 90)

DEF: 10 STR+10 DEX+5 Haste +12%
Subtle Blow +7
Damage taken -5%

Black Belt 4th dan (level 95)

DEF: 7 STR+10 DEX+5 Haste +12%
Subtle Blow +10
Damage taken -5%

Black Belt 5th dan (level 99)

DEF: 7 Atk+10 Acc+10 Haste +12%
Subtle Blow +10
Damage taken -5%

Til 10th dan. this is only an idea. but since now MNK is useful and there is not much new belt fit for monk and Accuracy is needed. please take a look into it! there should be something we can do with it. i dont want to store it and forget it!