Got noble knight again... this time with a final score potential of 75637, which makes me think that the end result is probably not due to the score, but rather character stats.
My end character stats for noble knight were;
Strength 23
Dexterity 14
Constitution 22
Wisdom 12
Intelligence 16
Charisma 14
And my skills are as follows;
Humility 64.6
Compassion, Temperament,and Morals 100
Faith46.5
Sin 0
Refinement 100
Magic attack 86.5
Magic defense 100
Combat attack and defense 100
Magic repute 36.6
Combat repute and fame 100
Generally, the best thing i've found to do is be warrior, get court training, and then max out the fighting class as soon as you can, getting a sword of mastery, and then easily running through the dungeons for money, which you can use to train your other stats later.
Noble Knight.
Tier 2. (92995 pnts)
It looks like Noble knight is up to 180k, if not more, and from the lowest point of 92k
If you want the max score, i'd assume you'd have to have max all stats but sin, and clear out all the dungeons.
Oh, and possibly max out dragon tamer+get "mastery item" in all classes.