We collect this guide from the 12sky official forum. The author is Bion, and all credit to it.

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General Builds

Underneath each class description, you'll find build assessments, mostly based on strength, dex, or rounded. Str and dex are by far the most important stats in this game. Vitality and chi aren't as important, but some is nice to have.

By Level 30 For Any Class
This is my suggestion, other players and yourself my like lowering certain ones and raising others, or drastically lowering one for another. Many types work. Just don't add too much chi.. The only true value in raising chi is to conserve chi pills.

By level 30, my recomended build for any class is:
Vitality- 17-27 ~ Some players don't even add any to this. They may add around 5 points total, and have less than 700 HP at level 50. This amount of vit allows you to take enough damage, to allow you another attack before an enemy hits you.

Chi- 10-20 ~ This is actually what most players would use. This allows you enough chi to pull of a few moves before having it all drained out. Heavenly serenity at a high level helps conserve your Chi pills anyways, so you will have enough for RvR too.

Strength
Dex- put the rest of your points into strength and dex as you see fit. If you want to hit and dodge more, add more to dex. If you want higher damage, and easier leveling, add more to strength. Personaly, I like to keep them basically even, but after I've gained a few levels, my dex grew 10-20 points higher than my str.

The Marbler

The Marble class is a priceless addition to RvR. While the Guanyin class is the most rounded of the three factions, the marble class is the most rounded of the three weapon types. The most prized feature of the marble class, is the ability to attack from afar. People take this ability to the extreme, and can make a 1-hit killer ranged character for RvR areas, which is very well liked. The Marble population is low, so new marbles are very welcome to the Guanyin Faction.

Skills-

The marble combo is: Single hit, Multi Hit, AoE Hit