Spell Singer: The Gaia summoner. As all summoner classes, this class uses a pet to fight by your side. It got rappelz-item.com/tag/skill/">skills to make a pet strong. Combined with this, it's also a good fighter by itself.
Holy Warrior: The Deva warrior. This class are mainly melee combat warriors. It has good defense and health, which makes it an excellent tank that can last long. Many weapons fit this class, some are 1-handed sword + shield, 2 1-handed swords, spear, 1-handed mace + shield etc.
Cleric: The Deva magician. This class are most known for the healing spells. It can heal other players and itself. This makes it an excellent class for playing in groups to keep people alive. It also have other good magic spells and buffs. I recommend using a staff for better healing when you are playing in a group or a mace when you play alone for a good combination of magic and melee attacks.
Breeder: The Deva summoner. A class where you use a pet fighting by your side. It has skills to make a pet strong in addition to pet healing and pet buffs. Recommended weapon is a 2-handed mace.