With high hp, def, and physical strength, they are good at both PvP and PvE solo. But that does not make them the best class, though it makes them very good for new players or fans of 2 hand swords.

Warrior- Warriors are the main fighter class who specialize in the use crimecraft cash of heavy armor (Armorsuit) and huge 2 hand swords.

Blader - Bladers are the fastest  melee characters. They use a combination of light yet maneuverable armor and 2 one hand swords.

Having light armor they have less "def" but way more of a dodge rate. They make great PvE and moderate PvP depending on how you train them. This makes them a wise class to pick if you really like PvE or duel wielding.

Wizard - Wizards are the basic magic class. They use what are called "orbs" which are used as magic amplifiers, and light armor.

Orbs attach to the character's wrists, and the orb on the right wrist summons a staff (mostly to make them look like they use a weapon/ also the cool factor) later on in the game they have incredible (both look and power) magic attacks/skills some of which have huge AoE .

The next 3 classes are classified as "Force" classes. Force classes are more like hybrids and they are.