When playing an advanced Knight, in AbDendriel, there is a small castle called Elven Bane. It is northwest of the Elven Fortress. In ElvenBanes basements, you will find good monsters to level on and some armor called “Chain Armor”, which you can sell to the the NPC in AbDendriel for 70 GP. When you level to 20, you should be able to fight most of the monsters in the entire castle. You should at least be level10 and have the following equipment for your character to survive:
Soldier Helmet
Scale Armor2
Handed sword
Brass Legs

 Leveling, and gaining gold and skills:
Note: Premium suggested.

Mages: Rune making while leveling at northwest rot worm cave, Hell-Gate using summons, party hunt on GS and Draggys. Note: For mages, train Magic to 50 and level to 42 and wait until you can go for Armageddon questing (after its update)

Knights: Train until 75/75 skills (Eq: Knight set, Bright Sword/Fire Axe/Skull Staff, 5 bps of uh). Hunting area: Poh, Mino kingdom, Kaz Dwarf Mines, Edron, Darashia.

Paladins: Train skills up to 78/62 (Eq: X-bow, 500 Bolts, 2 bp of uh, Crown Set, and black patent boots Of Haste). Most recommended area to level up: Poh (with at least 400 bolts). Party Hunts: Poh: Knights block, while Paladin and Mages attack, Demon-Knights block, two Mages stand by to heal, three Mages SD, two paladins SD and shoot Bolts.

Use the following trick for level 8 knights training in mainland. If you go to Carlin and have a shovel, go to west exit of Calin. Starting walking north until you see a forest. When in the forest, start going northwest until you get out of it, then go north until you see a forest to the left. Note: This may be only be on your map.
When you see it, go west until you see the sea in your screen. Then, go to north to find a gray rectangle on your map. Click on it and wait your character go to it automatically. When on it, say to the NPC:
-hi
-folda
-yes 

You will give 20 gp and will go to Folda. Once there, you will find many Frost Trolls. Pass the bridge until you see an hole. If it blocked, use your shovel. Go down and you will find Trolls, to the south, Minotaurs, and to the west, Rotworms, If you have good equipment and do not have a shovel, instead of going south after the bridge, go to the west and enter the first mountain that you see. There is a hole at this location that leads to Frost Trolls and Rotworms without requiring a shovel.

Hope this guide can give you some help youand enjoying your tibia game!