Here is a useful link to Lime Paradise, the LO fan site. http://lime-paradise.info/
You can find anything from skills to items to screenshots.
As far as classes goes, it's main healer cleric and DPS cleric (does damage with fewer heals/buff) and then Elemental Mage and Dark Mage (from my understanding)
At Lime paradise, there's a guide under the tools section that will give a lot of good info!