Hello all and before we get to this I just want to say that I'm only a lvl 39 writing this. But let's get back to the subject...
Level 1-5:
Take out things in the southeast like the budge dragons, spiders, and bull fighters. Make sure you update your armor and weapons frequently but not too much or you'll find yourself broke and asking people for zen. Also, stock up on apples so that you wont have to go back to the city, wait, then go back to fight. You'll find most apples from the things you kill.
Level 5-10:
Take out things in the southwest like elite bull fighters and hounds and make sure you stock up on lots of apples/potions. Do NOT repeat do NOT go past the short small pillars, there are giants there and they will probably hit 40s on you.
Level 10-15:
Ok NOW you can train on those giants. You'll also find hounds and elite bull fighters. Once again stock up on apples/potions.
Level 15-25:
Either go to Elite Yetis and ask nicely for a party telling your true level or just wait in the city on the east bridge for a strong person to come and ask for low level parties. Just stand there and make sure you have potions because elite yetis will want to attack you but then your party leader will kill it. Obviously you see those big numbers that they are hitting on you... DONT ATTACK TRAIN ON THOSE UNTIL LATER! Some party leaders are nice and give you money but don't count on it.
Level 25-35:
This part makes me very mad because it is probably the hardest. Party with stronger people on elite yetis or ice queen IF you can get them. If that doesnt work go to Noria and party with newbie elves on Stone Golems. If THAT doesnt work go to either East Lorencia to fight Liches and Skeletons or go to Dungeon without going too deep and fight skeletons.
Level 35-40:
This is the part I'm at and I may sound stupid but train on cyclops. DO NOT FORGET THE POTIONS AT THIS PART!!!!! So anyways you probably have skill on your weapons and if you don't then your chances of surviving will be slim to none. Get regular healing pots and small mana pots and more mana pots then healing pots. Right now I have 48 healing and 144 mana to fill up the whole inventory to last me all 10 bars but I have good armor. You probably want 3 lines of health and rest of mana.
Level 40-45:
Now train on ghosts. Once again DO NOT FOREGET THE POTIONS AT THIS PART!!!!! And once again you will need skill on your weapons or else you will die soon. The only problem about training on ghosts and cyclops is that you will never meet a gold budge dragon unless u find one on going your way to the dungeon.
Level 45-60:
Train on Elite Yetis and once again you need the potions. Hopefully you have skill on your weapons. Also party with newbs (lvl 15-20 or lvl 15-25) you will seem very strong because all the good armor and weapons come to you quicker. So just keep training and when your newb dies. Go and pick them up in the city (this will also give you an excuse to repot). Now you can find gold budge dragons and more random event things that drop either BOK+X or BOL. Have Fun!
Hope you enjoyed this guide. This is my first guide so I apologize if it is not like any of the other ones. Happy Training!