1. Force augmentation - this one's pretty obvious. It's the reason why Force Sensitives are so good, dictates their sensory skills, etc. Technical skill can't save you when the opponent has far better reflexes.
2. Force reserves / technical skill - that one's pretty obvious.
3. Force mastery / Force defenses / Form match-ups - telekinesis is usually not so relevant, and it's quite funny people tend to go by the idea "who wins the Force, wins all out". Unless advantage is really huge, you just punish the opponent with kinetical pressure, throw him around, but unless you're also very masterful in using the terrain for it, maintaining distance, capitalizing on momentary stuns (which is all about actual combat skill). It's more important if both combatants are on a level so high, they can use the Force as actual combat means (very rare), or if the disparity is way too high. Obviously it makes the rating more difficult; the relevancy of disparity in direct Force attacks goes up geometrically, not arithmetically. If the disparity is truly high, this aspect trumps everything else without a context. Now, form match-ups is the bad word to put it. Forms in themselves aren't that important... but the general "how do their traits stack up against each other" is obviously mad important. Look at the case with guys like Savage.
4. Tactical acumen / Physical strength / Emotional stability / Damage soak - depends on the case, on the matchup, on the character.
5. Hand to hand skill - incredibly irrelevant with the lightsabers.
As for sorcery, agreed with Skillz. It's the definition of a wildcard.