Leveling by Grinding

Full exp is only gained from monsters that are ±5 levels of you (as of 4th May 2013), therefore picking the right area to grind in should take this into account.
Area 	Monster Level	Monsters	Additional Notes
Hidden Lands 	48 	 	
Connected Path 	48 	 	
Death Valley 	50 	 	
Flood 	52 	 	
Ghoul Cave 	52 	 	
Stone Temple 	52 	 	
Spider Cavern 	52 	 	
Bug Cave 	52 	 	
Zuma Temple 	52 	 	
Maggot Lair 	52 	 	
Mount Doom 	55 	 	
Shelobs Lair 	55 	 	
Tongs Tomb 	55 	 	
Serpant Tomb 	57 	 	
Ant Cave 	62 	 	
Prajna Temple 	66 	 	
Terror Temple 	67 	 	
Black Dragon Dungeon	70 	 	
Jibs 	75 	 	
Ice Temple 	50 - 80 	 	
Past Bichon 	85 	 	
Svaltus 	85 	 	
Valkyre 	97 	 	
Hercules 	102 	 	
Foresti 	107 	 	
Thor 	112