The Fists of Rhalgr are exclusive to Ala Mhigo, but that does not necessarily mean that being a Monk is exclusive to Ala Mhigo. Monk bro is even teaching people Monk stuff in Revenant's Toll. There is a whole sect of the Fists that had been teaching people outside of Ala Mhigo before that. The Fists are simply the only school we know to have been wide spread and influential.
This all depends on your definition of a Monk. The Fists of Rhalgr are the only school we know of, but they don't necessarily have a lock on the idea of aether wielding martial arts or martial bent spirituality. Not a huge leap of logic to assume the Garleans have their own Monk school now, they snagged their own Ninjee types after all. They have certainly been occupying Ala Mhigo long enough.
Certainly possible to generate a different school of Monk-ness to suit the purposes of the story you are try to tell. I would advise against anything large, grand, or well known though. Smaller, clannish based stuff can serve just as well.
This all depends on your definition of a Monk. The Fists of Rhalgr are the only school we know of, but they don't necessarily have a lock on the idea of aether wielding martial arts or martial bent spirituality. Not a huge leap of logic to assume the Garleans have their own Monk school now, they snagged their own Ninjee types after all. They have certainly been occupying Ala Mhigo long enough.
Certainly possible to generate a different school of Monk-ness to suit the purposes of the story you are try to tell. I would advise against anything large, grand, or well known though. Smaller, clannish based stuff can serve just as well.