JDale and I have a little different philosophies on that, as I think that it is hard to tweak costs for professions using the existing RMU category system. I would want for example to be able to reduce the western monk's cost for runes but not attunement, culinary but not metalcraft, music but not stage magic, religion/philosophy but not racial or creature lore, and ritual but not core spellcasting. You could of course use my variant option to tweak those costs to produce a more specific class of monk:
http://www.guildcompanion.com/scrolls/2017/mar/individualskillcostoptionsforrmu.html
Overall, though, the monk is one case where his costs are reasonably well tuned to the profession, so you could probably stick just with the generic monk and not have too many problems.