Hi, guys. This is Thepowerlevel. Here is a leveling guide for 12sky players to get level 100 as soon as possible. This guide can help you to level in the best spots and save your time. So just enjoy it... 

Fujin: Padsong Fortress, Guanyin: Gungsong Fortress, Jinong: Hanma Palace
1-7 Zombie Soldiers
7-12 Hunch Back
12-15 Copper Soldiers
15-17 Bandits
17-20 Spear Soldiers

Fujin: Manpok Peak, Guanyin: Gocheon, Jinong: Sohom Forest
20-22 Bloody Hunch Back
22-25 Twin Sickle
25-27 Vagabonds
27-30 Buckethead

OK! NOW THE REAL PARTS!(using your max or near max Multi hit Skillz)
Training Style
Use your High Level Multi hit skill (depending on your weap), and kill the mob with most of your Chi, (have plenty of Hp Pills ready).

SPAM your multi hit (KILL) + Five-Star Peak + Repeat

(30-49) Ahmeng Valley RvR Areana - Superior Tablets (2x exp, wears off if u die or use /return or log out, Find Superior Tablets in the North middle Map of Ahmeng Valley, the Monsters there will have a chance to drop Superior Tablets)
Fujin: Nangun Peak, Guanyin: Tanwak Forest, Jinong: Gyochon Village
30-33 Wounded Soldier OR Stone Golem
33-37 Sword Yeti/ Undead Killer/ Bat Servant
37-40 Mutant Arms OR Red Toad

Fujin: Jungchu Valley, Guanyin: Wachon Village, Jinong: Yoksu Village
40-43Blue Kobold
43-46 Giant Bells
46-50 Tower Lifter
(50-69) Samji Island RvR Areana- 100k-500k Tickets from random mob (get about 1-5 each time training in the dungeon, IF you win battle, so you can buy MP Tablets for 3x faster training, for you will not need to use Five-Star Peak)

Fujin: Gemsaha Desert, Guanyin: Berim Forest, Jinong: Bulmun Valley
50-55 One Armed Man
55-60(50-70) Tattooed Killer
60-65 Pink Assassin/Blue Tower Lifters/Vagabond Leaders/Iron Giant Bell
65-70 Black Fiend/Zombie Generals

Level 70-100 Spots
(70-89) Wargo Island RvR Areana - Gift Box (Unique/Rare Random Items from levels 70-90 Equip OR Materials for Enchanting)
70-100 All the Caves after Yanggok Valley, from your own respective Faction. There are hidden Warps that do not show in your mini-maps, in these cave. 3 hidden caves with the same monsters but more spawn rate.

For Levels 90-100, I'm not sure about this but I've heard from other players that the next map after the caves are out. So you will have to train in these caves for now, it will be slow yes.