-Boss Hunting

The fastest way to level up is to kill bosses and mini bosses. The experience gained from a single mini boss is several times that of a normal monster. Additionally, mini bosses have higher drop rates than normal monsters. They are definitely worth killing and spawn frequently. Bosses give large amounts of experience as well and drop 1-4 enchanting materials plus a fortune pouch. These are more than worth your time. It would be wise to learn all of the spawn locations and times of the bosses and mini bosses.
-Stat B uild

Choosing your stat build wisely is the most important aspect of the game. How you distribute your points will decide what style of play you will have and whether or not you will succeed in the game. Your key stats are STR and VIT. At no point should you ever be adding DEX. You should add about 10 Chi at the beginning to help you level faster, but after level 30 you should reset you stats and add no Chi whatsoever. Increase your VIT to the point that you can kill the hardest monsters you can handle and put the rest into STR. By level 90(12sky2 Gold), you should have somewhere between 3:2 and 2:3 STR:VIT. As long as you have added no DEX or Chi after level 39, you will be able to grind quickly. Any other builds simply do not have enough Damage and HP.

- Weapon Type

Your choice of weapon determines how you play the game. You can choose between a Damage, Defence, and Ranged Weapon, but you should never choose the Defence weapon. Opposite of what one may think, having a higher defence does not help you to grind faster. It is better to pick the Damage weapon or Ranged weapon. If you would prefer to use the Area of Effect attack skill, pick the Offence weapon because it does the most damage of all the weapons. Otherwise, pick the Ranged Weapon as it is much faster and can kill bosses and monsters more quickly with its multi hit. Using a Ranged weapon also allows you to kill monsters of levels much higher than yours and use much less healing pills. Additionally, special tactics can be used with the Ranged weapon such as kiting.

-Skill Selection

Selecting your skills in the correct order can help you go through the lower levels quicker. The first skills you should kill are the run skill and the multi hit skill. Max out your multi hit skill as soon as possible. Next, get the attack speed/elemental damage buff and max it out. Max out your weapon buff and run skill next. Then max out your one hit and charged attack buff. Finish up by maxing out the stun, anti-stun and jump skills. As soon as possible switch from lvl 1 single and multi hit skills to lvl 30 single and multi hit skills. Learn formation skills, Heaven’s skills, and Garuda’s Prayer at level 90+ if and when you find them. Once you have enough skill points, max out all your skills and you’re done.