Western european monk....should have very limited self defense. We wouldn't be talking a shinto style martial artist here. I would focus on the channeling and spell abilties and give them a very limited range of weapons such as staff, dagger, club, knife, and maybe a highly defensive form of "martial art" style self defense.
Friar
blah blah
Abilities: Wisdom and Charisma are by far the most important ability for the friar as they affect their spell and channeling abilities. Constitution is also important, for the life of a monk is often a hard one born out of hardship, fasting, and spiritual enlightenment at the sacrifice of physical well being.
Alignment: Friars must share the alignment of their order.
Hit Dice: d6
Skills:
Balance (Dex), Concentration (Con), Craft (Int), Diplomacy (Cha), Gather Information (Cha), Handle Animal (Wis), Heal (Wis), Knowledge (religion) (Int), Knowlegde (individual skills) (Int), Listen (Wis), Perform (Cha), Profession (Wis), Sense Motive (Wis), Spellcraft (Int), Spot (Wis)
Skill Points at 1st level: (4+int mod) *4
Skill Points at each level: 4 + int mod
Weapon and Armor Proficiency: A friar is not trained to use any armor but he does gain skill in the use of the club, dagger, knife, and quarterstaff. In addition, in deference to the knowledge that friars are often in the wilds alone, they learn a simple form of self defense. Their unarmed attacks do not invoke attacks of opportunity but they are only trained to subdue, not to harm. They still suffer a -4 penalty to their attacks if they attempt to cause real, rather than subdual damage. In addition, a friar can deal subdual damage with his quarterstaff or club without suffering a -4 to his attack rolls. Finally, a friar is trained to use his senses to avoid blows. He can add his wisdom modifier (if positive) to his dexterity modifier when determining armor class.
Spells: <not sure>
Channeling: <not sure but it should be stronger than the cleric's.
Just my thoughts.
DC