You can use the inna's pants, chest and belt with the ring of royal grandeur and you will get the 4 monks mantra even if you play another class... This is obviously best suited for the demon hunter ( because dex )
It is not intended since you cant get the 4 bonus without the ring ( the other pieces are spirit stone and monk 2 handed weapon ) and the set clearly states "MONK ONLY".
What you get:
+250 Dexterity
You and your allies within 60 yards deal 101% of your weapon damage as Holy to attackers when blocking, dodging or getting hit.
You and your allies within 60 yards gain 4126 increased Life regeneration. The heal amount is increased by 30% of your Life per Second.
Enemies within 30 yards of you take 10% increased damage.
You and your allies within 60 yards gain 17% increased Dodge Chance.
Edit: changed boots to chest -daviloled. Added benefits.-ccrackheads