PROFICIENCIES
I didn't write the description of each proficiency here since I've made no modification from TSR's Skills&Power option book or the player's handbook. I did make some changes about their classifications, though and here
they are:
 
GENERAL
PROFICIENCY COST INIT ABILITY
Agriculture 3 7 Knowledge
Animal Handling 3 7 Willpower
Animal Training 4 5 Willpower/Leadership
Blacksmithing 4 6 Muscle/Knowledge
Boat Piloting 2 6 Muscle/Reason
Brewing 3 8 Knowledge
Carpentry 3 7 Stamina/Knowledge
Cobbling 3 7 Aim/Knowledge
Cooking 3 7 Reason
Dancing 2 6 Balance/Appeance
Deep Diving 2 5 Balance/Health
Engineering 4 5 Reason/Intuition
Etiquette 2 8 Appearence/Intuition
Fire Building 2 8 Intui/Reason
Fishing 3 6 Intuition/Knowledge
Gaming 2 5 Intuition/Knowledge
Heraldry 2 8 Knowledge
Leather Working 3 7 Knowledge/Aim
Mining 5 5 Intuition/Stamina
Modern Language 2 9 Knowledge
Musical Instrument 2 7 Leadership
Navigation 3 6 Knowledge/Intuition
Orienteering 3 7 Knowledge/Intuition
Painting 2 7 Aim/Intuition
Pottery 3 7 Aim
Riding Airborn 4 5 Willpower/Balance
Riding Landbase 2 8 Willpower/Balance
Rope Use 2 8 Aim/Intuition
Sculpting 2 5 Aim/Intuition
Singing 2 5 Leadership
Seamanship 3 8 Intuition/Balance
Stonemasonry 4 5 Stamina or Intuition
Swimming 2 9 Stamina
Tailoring 3 7 Aim/Reason
Weather Knowledge 2 7 Intuition
Weaving 3 6 Reason/Aim

 
SCHOLAR
PROFICIENCY COST INIT ABILITY
Ancient History 3 6 Intuition/Knowledge
Ancient Language 4 5 Knowledge
Animal Lore 3 7 Knowledge/Intuition
Appraising 2 8 Reason/Intuition
Astrology 3 5 Intuition/Knowledge
Astronomy 2 7 Knowledge
Cryptography 3 6 Reason/Intuition
Healing 4 5 Intuition/Leadership
Herbalism 3 6 Knowledge/Intuition
Local History 2 8 Knowledge/Appearence
Reading/Writing 2 8 Knowledge
Religion 2 6 Intuition
Spellcraft 3 7 Reason

 
PHYSICAL
PROFICIENTCY COST INIT ABILITY
Armorer 5 5 Knowledge/Muscle
Blind Fighting 4 7 Intuition/Balance
Bower/Fletcher 5 6 Knowledge/Aim
Charioteering 4 5 Balance/Willpower
Gaming 4 5 Leadership
Endurence 2 3 Stamina/Health
Hunting 2 7 Intuition
Mountaineering 4 7 Stamina/Willpower
Running 2 5 Stamina/Fitness
Set Snare 4 8 Aim/Intuition
Survival 3 6 Knowledge/Willpower
Tracking 4 7 Intuition
Weaponsmithing 5 5 Knowledge/Aim

 
ACROBATIC
PROFICIENCY COST INIT ABILITY
Disguise 4 5 Intuition/Leadership
Forgery 3 5 Aim/Willpower
Gem Cutting 3 6 Aim
Juggling 3 7 Aim
Jumping 2 8 Muscle/Balance
Reading Lips 3 7 Knowledge/Intuition
Tightrope Walking 3 5 Balance
Throwing 2 8 Aim/Muscle
Tumbling 3 7 Balance/Muscle
Ventriloquism 4 5 Knowledge/Leadership